Re: [Elecraft] [KX3] Re: Kx2 paddle issue
It's useful to remember that a screw (or bolt) is a spring. When tightened it stretches lengthwise. Like any spring, it offers the best "grip" when subjected to the right range of pressure. Way back in my High School days (1950's - before Mercury was a toxic substance) I watched a demonstration using a bolt and nut made of frozen Mercury. Mercury is not elastic. Liquid Mercury was poured into molds for a nut and bolt and hardened with liquid nitrogen. Using gloves, the demonstrator assembled the nut and bolt using a large wrench to apply a great deal of torque. That done, anyone could loosen it without a wrench by just twisting the nut or bolt with minimal finger pressure (inside the gloves of course). There was no resistance since Mercury does not stretch. It's easy to over torque (stretch) small screws. That's why the Elecraft kit assembly manuals do not recommend using power screwdrivers. The Elecraft factory in Watsonville is equipped with special torque-limiting power screwdrivers to allow quick assembly with screws not so tight they are damaged or broken. Since a screw is basically an inclined plane that stretches the screw when tightened, vibration will allow the screw to turn (slide along the plane of the threads), hence the use of lock washers or chemical compounds in such environments to stop any movement. Perhaps the issue with the KX2 paddles is the vibration as the contacts collide allowing the screws to turn. Working remotely on the Elecraft manuals I've not been directly involved with the issue, so that is pure speculation. 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Re: Kx2 paddle issue
I suspect you are right, since the website lists it as an "Adhesive". 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mark Goldberg Sent: Monday, July 24, 2017 2:38 PM To: Ron D'Eau Claire Cc: Elecraft; w4sc Subject: Re: [Elecraft] [KX3] Re: Kx2 paddle issue Loctite 425 appears to be the only one they recommend for metal to plastic. It is Cyanoacrylate based. It may not be that much different from the plain old CA glue you used, except it is a pretty Loctite blue! http://www.na.henkel-adhesives.com/product-search-1554.htm?nodeid=8797887234 049 73, Mark W7MLG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Re: Kx2 paddle issue
Hi Josh: When I bought Loctite I had a choice of only two, red and blue. So I just looked and that's all the Loctite web site lists now (they do have a variety of glues and other chemicals but I am looking at threadlockers). Red Loctite requires heating the screw to 500F to remove it. Blue Loctite can be removed using hand tools. They do say they are not "recommended" for use on plastics, but I believed they meant securing plastic threaded parts. In my case it was a steel screw and nut so I used blue Loctite on the screw threads. A tiny amount of the Loctite must have flowed onto the plastic hole in the parts the screw and nut were securing. That was enough that resulted in slow disintegration from a hole for a #4 screw out to an inch more in all directions. I'll continue to use a drop of CA glue since I've never had a screw secured with it come loose yet they are easily removed when needed. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Josh Fiden Sent: Monday, July 24, 2017 1:20 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [KX3] Re: Kx2 paddle issue There are something like 40 different formulations of Loctite Threadlocker. It's a great product *if* you select the correct one for your application. The wrong one can be a disaster. 73, Josh W6XU On 7/24/2017 12:48 PM, Ron D'Eau Claire wrote: > Perhaps Loctite has changed the formula __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Re: Kx2 paddle issue
I avoid Loctite after using it to secure a steel screw and nut holding a plastic part. Over the next six months the plastic around the screw disintegrated - crumbled. That was several years ago. Perhaps Loctite has changed the formula, but I haven't succumbed to making another test. I found that a small drop of thin (not gel) CA glue (a.k.a "superglue") on the threads of a screw works very well, yet the screw can be removed later if needed with little effort. The threads do not need to be coated. Just a small amount where the screw enters the threaded section, or a small drop on the end of the screw where it exits are all that is needed. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mark Goldberg Sent: Monday, July 24, 2017 11:09 AM To: w4sc Cc: Elecraft Subject: Re: [Elecraft] [KX3] Re: Kx2 paddle issue There are many different Loctites of each color. Exactly what has worked for you? I have settled on Blue Loctite 243 for it's improved temperature range, better compatibility with Stainless Steel hardware and oil resistance. 73, Mark W7MLG On Mon, Jul 24, 2017 at 10:05 AM, w4sc wrote: > You may want to reconsider using Loctite Red (or Blue), the highest > strengths. If you ever want to disassemble that part of the XDP2, it > may take heat and excessive force to loosen. > > Loctite Purple is probably more than adequate for the securing of the > posts. A tiny dab of Purple on the end of the screw threads worked > great for me. > > REF; http://henkeladhesivesna.com/blog/the-difference-between- > red-blue-green-and-purple-threadlockers/ > > 73 de Ben W4SC > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > marklgoldb...@gmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] W2 watt meter- multiple sensors question
Yes. It just takes switching the 8-wire connection to a new sensor with something like this: http://www.computercableinc.com/ccinc/products.jsp?sub=Switch+Boxes+-+Manual &id=1173 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave Fugleberg Sent: Saturday, July 22, 2017 2:31 PM To: Elecraft List Subject: [Elecraft] W2 watt meter- multiple sensors question I see that the W2 can support up to 2 remote sensors, selectable from the front panel. Is it possible to support more (say 4 total) with some kind of external switching arrangement? I have a K3 with three XV series transverters (144, 222, 432). Each transverter feeds a power amp and connects to an antenna for that band. I currently use separate external meters at the output of each amplifier. I'd like to replace those with a single meter that can monitor whichever band I'm transmitting on. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Really OT: Inside-the-vehicle HF antennas (possible bonus points)
I thought that was how FM antennas were implemented in some cars already, but without using resistance wire. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Randy Bright Sent: Saturday, July 15, 2017 8:18 PM To: Wayne Burdick Cc: Elecraft Reflector Subject: Re: [Elecraft] Really OT: Inside-the-vehicle HF antennas (possible bonus points) Would there be a way to repurpose the defrost wiring that is sandwiched between the layers of glass in some back windows and use that thin wire for your antenna? Randy AK4QK Member Calhoun County Amateur Radio Assn. NAQCC #6312 On Jul 15, 2017 7:54 PM, "Wayne Burdick" wrote: > I’m dealing with one of the last unsolved problems in amateur radio: > how to operate HF mobile without an antenna. At least not one that, > according to some vehicle co-owners/spouses, would defile your new sedan. > > For 10 bonus points that have only philosophical value, your challenge > is to create an invisible mobile antenna and actually make a QSO on > it. For practical purposes (i.e., not frying the car or passengers) > let’s say the maximum power level is 10 watts. The bands of interest are > 40-10 meters. > > Here are some ideas I’m considering: > > - mag loop in the rear window > - thin wire loop on a roof rack > - gamma match to the entire roof > - surface acoustic waves > - prayer > > Other ideas? > > Yes, I know this violates the laws of physics and bioethics. And I > fully expect the car to generate debilitating levels of RFI. But isn’t > this the least you’d expect from an unsolved problem? > > Thanks in advance, > > Wayne > N6KR > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > randy.ak...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] my KX2 experience and a minor structural issue
There is nothing wrong with immersing the plastic bezel in a dish of soapy water. Just be sure it's a liquid soap in the water and not a scouring cleanser. After washing, using my fingers to gently rub the bezel in the soapy water, I lay the bezel on a soft terrycloth towel or even a paper towel and pat it dry. Then, while assembling, I use an air duster to blow off any bits that accumulate on the inside of the bezel or LCD when mounting the bezel. If you do end up with a scratch on the bezel, use any of the acrylic polishes commonly available. Most automotive stores sell it to clear the lenses on automobile head and tail lights. A lot of wear and heavy scratches can be polished away very easily with that stuff. Many airport shops that sell supplies also carry it for polishing aircraft windscreens that become pitted and scratched over time. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of n...@zianet.com Sent: Monday, July 10, 2017 11:57 AM To: Walter Underwood Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] my KX2 experience and a minor structural issue Walter Underwood writes: > With sand, I would not use a rag. Flush under running water until clean, then dry off gently. Actually, that's how I did it. You verbalized it better than me. The point is, wiping off sand and grit on plastic with a dry rag is guaranteed to cause scratches. Let water do the work; avoid soaps and harsh cleaning agents. 72, Paul NA5N __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] my KX2 experience and a minor structural issue
I keep an air duster handy to blow off the LCD and inside of the bezel just before mounting it. I agree 100% with the liquid dish washing detergent suggestion to clean the surfaces. It's what we recommend in the kit assembly manuals for all the Elecraft rigs. However, never spray, dribble, etc., a soap mixture directly onto the LCD. Wet a soft cloth with the mixture and wipe the surface with it just as you'd clean a monitor screen. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Chris Tate - N6WM Sent: Monday, July 10, 2017 2:34 PM To: Bob McGraw K4TAX; elecraft@mailman.qth.net Subject: Re: [Elecraft] my KX2 experience and a minor structural issue Of course.. My bigger concern is the sand that squeaked through the opening in the plastic lens and the case.. and sand is in the lcd.. going to need to be very careful with that. From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on behalf of Bob McGraw K4TAX [rmcg...@blomand.net] Sent: Monday, July 10, 2017 2:00 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] my KX2 experience and a minor structural issue A drop or two of liquid dish washing detergent and soft cloth or rubbing with ones fingers works quite well.A word of caution, NEVER wipe a dry plastic lens. Any dust particle will most likely scratch the surface. On 7/10/2017 3:38 PM, KD7PY wrote: > I use this to clean the display and lens.. > > https://www.amazon.com/Blower-Digital-Screens-Cleaning-Keyboards/dp/B0 > 0LV01BT2/ref=sr_1_7?ie=UTF8&qid=1499718910&sr=8-7&keywords=camera+lens > +brush > > > Ed KD7PY > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/my-KX2-experience-and-a-minor-str > uctural-issue-tp7632377p7632385.html > Sent from the Elecraft mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > rmcg...@blomand.net > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to ct...@ewnetinc.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@cobi.biz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KX-3 for Sale
This was not used for field day! Actually, it has gotten very little use; I haven't had the time do to portable operation, so I will continue to use my K3s at home, but make this rig available to someone who can make better use of it. Photos available on request. It has the 15 watt firmware installed, comes with the MH-3 hand mic, and all manuals, and some interconnecting cables.I am the second owner, and have had it for about a year.It was ordered as a factory-built unit in 2013, and it looks like new and works as it should. (The serial number is 04834.) It has the following options, all factory installed: KXFL3Dual Passband Roofing Filter. KXAT3Automatic antenna tuner. KX3 2M AT2 Meter All-Mode module. KXBC3Clock/battery charger, with low discharge-rate batteries installed. KX End Panels and Lexan cover. Palm Pico Paddle with mounting bracket. (It connects to the rig the same way the Elecraft paddle does.) 2 Meter flex antenna. Pro Audio Engineering low RFI AC adapter/charger. (14.4 vdc at 4 amps) Generic AC adapter/charger that is almost as clean as the Pro Audio unit, with the same voltage and power output specs as the Pro Audio. End-fed un/un longwire antenna with coax feedline. Orange soft case by "Rose"with the original owner's callsign embroidered under the "Elecraft" name. Asking $1700 plus shipping from NY, or pick it up in the NYC/LI area. I also have a Chameleon CHA-P (version 1) loop antenna available! RonWA2EIO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3. FD shutdown
If it was mine, I'd start by dropping it onto the operating desk from a height of about 6 inches, onto the bottom feet and, if that didn't make it quit, onto the side feet. I presume the cables you checked were external to the K3. There are a number of coaxial cables with TMP connectors around the synthesizer and reference oscillator boards the might be loose since they are simple friction fit connectors. IF it is a K3/100, be sure the KPA3 amplifier module is fully seated and the screws are in place. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Nr4c Sent: Thursday, June 29, 2017 8:49 AM To: elecraft Subject: [Elecraft] K3. FD shutdown My K3 (s/n 453x) has been used for FD and other outdoor events plus use at home (till I rec'd one of the first K3Ss). On at least 2 events in past year it has exhibited little output power. Batteries were checked, cables checked and replaced, to no avail. Display did not show SWR when TUNE button pressed (only "--"). Another K3 was swapped in and everything was fine. I took radio home and it worked perfectly. This year at FD, it quit at around midnight. Even tried <12 W to verify LPA. Result little or almost no power. Checked LPA screws but they were tight. Voltage on radio was just above 12v on TX. Took it home and it shows no sign of low power. It has worked well all week. Reloaded FW from Elecraft and reloaded last CONFIG file (May 2017 just before first event of year and did TX cal at this time). Now hooked to dummy load and running stress test with FD CW msg on repeat. Anyone have ideas? Sent from my iPhone ...nr4c. bill __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: 2017 Chevy Silverado 1500 power outlets
Clay, I believe it has to do with danger to your equipment should the connection between the battery and the chassis open. In that case all the current to all the automobile systems, from starter to lights to ignition, radio, etc., would flow through the ground path provided by the radio if it is connected directly to the negative battery terminal. Since that can be 100's of amperes when starting the engine, no radio is likely to survive. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Clay Autery Sent: Tuesday, June 27, 2017 8:21 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: 2017 Chevy Silverado 1500 power outlets Horse puckey! I DEFY you to prove the physics OR math of that ridiculous statement. __ Clay Autery, KY5G On 6/27/2017 9:55 AM, donov...@starpower.net wrote: > WARNING! > > > For extremely important safety and fire prevention reasons reasons, no > accessory should ever be connected directly to the negative terminal > of an automotive battery . Just like when charging an automotive > battery, the negative lead of a cable running directly to the battery > should always connect to the engine block and never directly to the > battery. > > > The positive lead must be fused where it connects to the battery. > > > There's an excellent discussion here: > > https://www.w8ji.com/negative_lead_to_battery.htm > > > 73 > Frank > W3LPL __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX2 heatsink
Yes. I was busy cooking dinner and was glancing at the power displayed on an external meter from time to time. I've not seen the power shut down on me, but then I'm seldom running QRO (>10 watts) with any rig. 73, Ron AC7AC -Original Message- From: Wayne Burdick [mailto:n...@elecraft.com] Sent: Sunday, June 18, 2017 4:51 PM To: Ron D'Eau Claire Cc: Irma & Linas(LY2H); elecraft@mailman.qth.net Subject: Re: [Elecraft] KX2 heatsink Auto power reduction happens at 63 C. But it may very well have gone down to 55 C awhile after dropping to 5 W. Wayne N6KR http://www.elecraft.com > On Jun 18, 2017, at 4:38 PM, Ron D'Eau Claire wrote: > > Sri, I meant the temp was 55C, not 45C after the automatic power > reduction kicked in. > > 73 Ron AC7AC > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau > Claire > Sent: Sunday, June 18, 2017 4:28 PM > To: 'Irma & Linas(LY2H)'; elecraft@mailman.qth.net > Subject: Re: [Elecraft] KX2 heatsink > > Fired up my "stock from the factory" KX2 into a dummy load at 10 > watts, key down, and it dropped to 5 watts after 4 minutes running > from a 13.8 vdc supply. PA temp was about 45C. > > Hope that helps with your analysis. > > 73, Ron AC7AC > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Irma & > Linas(LY2H) > Sent: Sunday, June 18, 2017 2:33 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] KX2 heatsink > > Hello folks, > I am looking for the practical , empyrical, real info based on the > individual measurements of the maximum Key-down time/temperature at > the 10w output of the KX2 before it drops down to 5 W issuing a > message of "HI TEMP". I would also like to learn about comparison of > the KX2 stock heatsink vs the Pro-audio Engineering KX22 product. > > The reason is that I have decided to install the KX22 on my KX2 ( # > 148*) after a short dx-pedition to Aland islands in May. I was > handling quite a pile-up from the hotel room and after some 5 min of > intensive CQ-ing and answering on CW the PA temperature gone up to > 59-60C degrees and the power dropped down to 5 W and it was > frustrating :) Today I have installed the PAE > KX22 heatsink. The key-down at 10 W into a dummy load in CW mode > lasted for around 3 minutes starting from the ambient temp. 27C. I > don't think this is very impressive baring in mind the Pro-audio's > claim of the 250% key-down time improvement. Unfortunately, I was not > so smart to test the key-down time with the stock heatsink before I > changed it to the new one, :) But I remember Wayne was posting here > in the previous thread something abt 7 min of key-down at 10W... So, > with the 250% improvement with the KX22 it should last... for some 24 > min?! in my case, It doesn't sound very realistic , neither 7 min with > the stock heatsink, nor 24 min with the Pro-Audio ( maybe ,bad thermal > contact, not enough of grease?). That's why it would be very > interesting to compare the real-life empyrical data of the other KX2 owners. > > 73! Linas LY2H > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > r...@elecraft.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > r...@elecraft.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > n...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX2 heatsink
Sri, I meant the temp was 55C, not 45C after the automatic power reduction kicked in. 73 Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau Claire Sent: Sunday, June 18, 2017 4:28 PM To: 'Irma & Linas(LY2H)'; elecraft@mailman.qth.net Subject: Re: [Elecraft] KX2 heatsink Fired up my "stock from the factory" KX2 into a dummy load at 10 watts, key down, and it dropped to 5 watts after 4 minutes running from a 13.8 vdc supply. PA temp was about 45C. Hope that helps with your analysis. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Irma & Linas(LY2H) Sent: Sunday, June 18, 2017 2:33 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KX2 heatsink Hello folks, I am looking for the practical , empyrical, real info based on the individual measurements of the maximum Key-down time/temperature at the 10w output of the KX2 before it drops down to 5 W issuing a message of "HI TEMP". I would also like to learn about comparison of the KX2 stock heatsink vs the Pro-audio Engineering KX22 product. The reason is that I have decided to install the KX22 on my KX2 ( # 148*) after a short dx-pedition to Aland islands in May. I was handling quite a pile-up from the hotel room and after some 5 min of intensive CQ-ing and answering on CW the PA temperature gone up to 59-60C degrees and the power dropped down to 5 W and it was frustrating :) Today I have installed the PAE KX22 heatsink. The key-down at 10 W into a dummy load in CW mode lasted for around 3 minutes starting from the ambient temp. 27C. I don't think this is very impressive baring in mind the Pro-audio's claim of the 250% key-down time improvement. Unfortunately, I was not so smart to test the key-down time with the stock heatsink before I changed it to the new one, :) But I remember Wayne was posting here in the previous thread something abt 7 min of key-down at 10W... So, with the 250% improvement with the KX22 it should last... for some 24 min?! in my case, It doesn't sound very realistic , neither 7 min with the stock heatsink, nor 24 min with the Pro-Audio ( maybe ,bad thermal contact, not enough of grease?). That's why it would be very interesting to compare the real-life empyrical data of the other KX2 owners. 73! Linas LY2H __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX2 heatsink
Fired up my "stock from the factory" KX2 into a dummy load at 10 watts, key down, and it dropped to 5 watts after 4 minutes running from a 13.8 vdc supply. PA temp was about 45C. Hope that helps with your analysis. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Irma & Linas(LY2H) Sent: Sunday, June 18, 2017 2:33 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KX2 heatsink Hello folks, I am looking for the practical , empyrical, real info based on the individual measurements of the maximum Key-down time/temperature at the 10w output of the KX2 before it drops down to 5 W issuing a message of "HI TEMP". I would also like to learn about comparison of the KX2 stock heatsink vs the Pro-audio Engineering KX22 product. The reason is that I have decided to install the KX22 on my KX2 ( # 148*) after a short dx-pedition to Aland islands in May. I was handling quite a pile-up from the hotel room and after some 5 min of intensive CQ-ing and answering on CW the PA temperature gone up to 59-60C degrees and the power dropped down to 5 W and it was frustrating :) Today I have installed the PAE KX22 heatsink. The key-down at 10 W into a dummy load in CW mode lasted for around 3 minutes starting from the ambient temp. 27C. I don't think this is very impressive baring in mind the Pro-audio's claim of the 250% key-down time improvement. Unfortunately, I was not so smart to test the key-down time with the stock heatsink before I changed it to the new one, :) But I remember Wayne was posting here in the previous thread something abt 7 min of key-down at 10W... So, with the 250% improvement with the KX22 it should last... for some 24 min?! in my case, It doesn't sound very realistic , neither 7 min with the stock heatsink, nor 24 min with the Pro-Audio ( maybe ,bad thermal contact, not enough of grease?). That's why it would be very interesting to compare the real-life empyrical data of the other KX2 owners. 73! Linas LY2H __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Packing Peanuts
I dislike the peanuts too but about the static charge note that all the Elecraft manuals instruct builders to wear a grounded wrist strap or as a minimum, touch a metallic ground before touching any sensitive parts. 73. Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of GaryK9GS Sent: Saturday, June 17, 2017 8:02 PM To: Ian Kahn, KM4IK; 'Kevin - K4VD'; 'Elecraft Reflector' Subject: Re: [Elecraft] Packing Peanuts Frankly I'm shocked that Elecraft used Styrofoam packing peanuts. I work in electronics manufacturing and my company has banned them from our building well over a decade ago. All of our vendors are required to not use them. They are a killer for electronic components. It is precisely the static charge that causes them to stick to everything. What do you think happens to that static charge that is present on your body after handling this packing material when you open a static bag containing static sensitive parts? It has to go somewhere. 73, Gary K9GS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Packing Peanuts
By now someone must have done a graduate thesis on the lost productive hours caused by people chasing those things. So how many cubic kilometers of peanuts are lying buried in landfills? How many are stuck in the guts of hapless seagulls and other scavengers? Boggles the mind. 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3S]. New out of box, no ssb output
Did you enable mic bias? Ron WA2EIO On 6/17/2017 10:16 AM, Wp4cw via Elecraft wrote: Gm all I was able to test my CW and it works (100w). Now moving to SSB. Mic is Mh2 Set Mic to front panel , low I turn vox on No out put Can anyone let me know what I'm missing. Thank you. Ted -- View this message in context: http://elecraft.365791.n2.nabble.com/K3S-New-out-of-box-no-ssb-output-tp7631797.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa2...@optonline.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT Learning Morse anew
In military and commercial brass pounding in the USA, we were limited to something between 13 and 20 wpm, usually closer to 13, because long studies demonstrated that slower is faster because of fewer mistakes copying every letter correctly on a keyboard or paper. And hearing whole "words" was a path to disaster if one was copying five letter code groups. If I was caught trying to run an Army CW net above about 15 wpm I'd likely end up on KP for a month. (KP = kitchen police: cleaning kitchens, peeling potatoes, etc.) The object was to ensure that everyone on the circuit could copy perfectly the first time. In the "day" some commercial point-to-point circuits required the operators use the "company key" provided - a bug with the weights welded on for about 15 wpm just to keep the speeds down for faster message handling. I've seen commercial ship/shore traffic running very slow due to a shipboard operator who was not proficient at CW. The shore station had to run equally slow, no matter how painful. But Amateur Radio is a whole different world with different skills being most useful, skills such as head copy at 20 or 30 wpm. I enjoy "reading the mail" on CW while puttering around the shack, just as if listening to a voice transmission. And many Hams enjoy constantly pushing the envelope on speed just for the fun of it. Ham radio is, after all, a Hobby. If the other station copies the name as Don, not Ron, and the QTH as Forest Lawn (a cemetery in Los Angeles) and not Forest Grove (a town in Oregon), it's easily corrected on the next transmission. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of KENT TRIMBLE Sent: Monday, June 12, 2017 11:31 AM To: f...@fmeco.com; elecraft@mailman.qth.net Subject: Re: [Elecraft] OT Learning Morse anew One caveat, Fred . . . Traffic handlers MUST copy on paper or on a word processor. In my opinion, one is not a skilled telegrapher until one can copy in head and on paper with equal accuracy. 73, Kent K9ZTV On 6/12/2017 11:59 AM, Fred Moore wrote: > the moral... put down the pencil and paper. > > Fred Moore > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 6m off-frequency
On my few excursions into SSB land, I've actually had operators answer my CQ saying I was "off frequency" because I was not aligned exactly on some multiple of 500 kHz. I apologize for any confusion and state that I am on XXX.440 or some similar "non 500" frequency. And then return to CW. I do remember the days of a 10 minute long CQ followed by ten more minutes of tuning across the Novice band looking for an answer. I often miss those days and the ops I met back then. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike Rhodes Sent: Sunday, June 11, 2017 6:10 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] 6m off-frequency ...would certainly be interesting to set those operators who tune for the "zeros" down in front of a vintage rig with a tuning dial - although I think Erik alluded to that a bit in his post. Better yet, how about a stint in the crystal controlled Novice band where you tuned from one end of the band to the other in search of an answer to your call. Mike / W8DN Yes, a crusty OT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Field use of Counerpiose
Agree with Don 100%. Keep in mind that the power is divided between the counterpoise and the end fed antenna wire. The power divides according to their impedances; if the impedances are equal, you lose 3 dB (half of the power) in the counterpoise. So the idea is to have the counterpoise present the lowest impedance possible and the antenna present the highest impedance possible. Usually the easiest first step is to raise the impedance the antenna presents. That's usually limited by the range of the tuner you are using to match the system to your transmitter but the ideal length is an electrical 1/2 wave of wire. Get a close as the tuner have can find a match. Next you lower the impedance of the counterpoise - the more wires the better although the advantage of more than 6 or 8 wires is pretty small. As Don noted, that also keeps the RF voltage at the rig low. Those are the ideals for an end fed wire. Most of us have to settle for something less for a variety of reasons. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Sunday, June 11, 2017 3:11 PM To: Gerry Miller; elecraft@mailman.qth.net Subject: Re: [Elecraft] Field use of Counerpiose Gerry, If your purpose for your "counterpoise" is simply to complete the antenna, then it does not make much difference whether it is grounded or not. But if its purpose is to keep RF off the enclosure of the rig, there is a difference. If it is 1/4 wavelength long, then it should not be grounded - just like any 1/4 wavelength wire, it is a low impedance point at the 'shack' end. OTOH, if it is 1/2 wavelength long, ground it to produce a low impedance at the 'shack end. A bit of study on antennas and feedline characteristics may be helpful. The 'counterpoise' acts like an antenna wire. 73, Don W3FPR On 6/11/2017 4:44 PM, Gerry Miller wrote: > > Does one ground to earth, the far end of an HF counterpoise or just let it float above ground at a field location? I had always believed it should not be grounded. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT Learning Morse anew
Hi Jim: I KNOW I learned Morse all wrong, according to today's experts. Listened to ARRL bulletins, code practice tapes a neighbor Ham made for me and a buddy and practiced sending on a straight key focusing on proper spacing at all times. I can copy 40 to 45 wpm in my head, 35 wpm on a keyboard and 20 wpm on paper. Since 99.9% of QSO's I encounter on the air are at around 20 wpm I've never pushed much beyond that for routine operating. So the obvious questions are: What speed do you want to attain? What technique are you using to raise your speed? (My "technique" has always been to copy a LOT of CW and try to find stations sending at about my upper limit. I don't need to work them. In fact not having to copy is an advantage. I just want to "read the mail".) What is a PAE heat sink, an after-market heat sink? 73 Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Sr Sturges Sent: Sunday, June 11, 2017 3:25 PM To: Elecraft Reflector Subject: [Elecraft] OT Learning Morse anew I think I learned code all wrong. Can't ever seem to get my speed up. Surely some of the astute among you _know_ The Perfect Method, and I hope you will share? To complete the OT-ness of this msg, I recently completed the QRP Labs Ultimate WSPR/QRSS kit and re-learned the joys of soldering iron burns, again. Certainly nothing wrong with Hans' excellent kits, and the price is amazing for the functionality, design, and quality. Then I installed the PAE heat sink end panels on my KX2. The latter is not for the faint of heart! I STRONGLY recommend the somewhat buried hint in PAE's instructions to remove the AT board before attaching the PA transistors to the heat sink. Tried it the other way and re-discovered that my micromanipulation skills are right up there with my CW -- maybe better, which is damned depressing. So, any help mastering Morse? Thanks in advance and 73, Jim N3SZ -- Jim Sturges, N3SZ Amateur Radio operators do it with frequency. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 6m off-frequency
Have you experienced this on other bands, during casual operating since the rig was returned to you? I find that when I am on SSB, I tune until my ear may likes what I am hearing , and as such, I may not be exactly on their frequency. (that is one reason for RIT!) Also, I have found that some ops feel that they have to be tuned to an even frequency on their digital display. For them, if you are on 14.219.8 and not on 14.220.0 then you are off frequency. Ron WA2EIO On 6/11/2017 11:45 AM, Ian Kahn wrote: All, I've been operating a little in the ARRL VHF contest this weekend, on 6m, and I'm having an interesting, and not good, experience. Everyone I try to work is reporting that I'm off frequency by about 500 Hz. I don't have RIT/XIT enabled. My K3, s/n 281, went to Elecraft earlier this year for some upgrades and a tune-up, and came back with a clean bill of health and meets/exceeds specs. I admit, I am new to 6m operation, but this constant report of being off-frequency concerns me. Is there some calibration step, specific to 6m, that I missed? I don't get this report on any other band, and have never gotten it in over 6 years of operating this rig. My assumption is that if it came back from the Mother Ship clean, and I've never used 6m before, that it should be properly calibrated. Any guidance/advice is greatly appreciated. Thanks and 73, --Ian Ian Kahn, KM4IK Roswell, GA EM74ua km4ik@gmail.com 10-10 #74624 North Georgia Chapter #2038 PODXS 070 #1962 K3 #281, P3 #688 KAT500 #860, KPA500 #1468 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa2...@optonline.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K2] No signal at TP1 during Alignment and Test Part 2
I agree with Don's comments on the soldering. I am not familiar with the kit, but if you had to wind the torroid yourself, were you sure to remove ALL the insulation from the wire ends before soldering them to the board? 73, Ron WA2EIO On 6/9/2017 10:41 AM, Don Wilhelm wrote: Robert, I just now had time to look at your photos. It seems to me that your solder on T5 (and maybe elsewhere) looks like "balls" with convex sides. That is indicitive of a solder connection that has not received enough heat. A good solder connection should have a slight fillet and end up with obvious solder that has flowed out entirely onto the solder pad and also up onto the leads. The edges of the solder should taper out to an almost invisible edge with a concave fillet of solder between the pad and the lead. See the diagrams in the Soldering Tutorial available at the Elecraft website (you may have to search for it). I suggest you remove the solder from any connection that looks like those and re-do them. Do not apply so much solder to "pile it on" - that does no good. Heat the solder pad and lead until you can see the solder flow out onto both. Using a small gauge solder helps. With large diameter solder, by the time you apply 'a little bit', that is already too much. Save the large solder for antenna wires. 73, Don W3FPR On 6/8/2017 10:20 PM, Robert Forster wrote: This should lead me to suspect T5 correct? the soldering on the underside of the board for T5 looks ok (no ring for these points but the topside of the board looks rough! I used the USB microscope and took some photos. Here: https://flic.kr/s/aHsm2aNdeG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa2...@optonline.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] BL2 Balun Question
Terry, to answer your question, that ground connection simply ensures the balun pcb and the outer shield of the coax cable feeding the balun remain at a low RF potential, even if you feed a fairly high impedance load. You are correct to connect them to the A and B terminals. Either wire to either terminal is fine. The "balun" isolates the wires from the coaxial line. IF the balun and rig are close to each other, I'd not use the balun for short end fed wire / counterpoise wire setups. Note that the RF currents flowing inside a coaxial transmission line *are* balanced if the line is terminated in a balanced load. The balance is determined by the load, not the transmission line. Since RF flows on the surface of the conductors, there are actually three (3) conductors in a coaxial transmission line: 1) The center conductor, 2) The inside surface of the shield and 3) The outside surface of the shield. A properly installed coaxial line will prevent coupling between the inside and outside of the shield. If, for example, one connects a coaxial line to a dipole by unbrading a length of shield, twisting it and soldering it to one side of the dipole the inner and outer surfaces of the coaxial shield are now connected in parallel. RF currents now flow down the outside of the shield in parallel with that side of the dipole. In some situations, this is of little concern but if one wants the advantage of the inherent shielding provided by coax, it is important to decouple the outer surface of the shield from the inside surface. The "balun" can provide this function by suppressing RF currents flowing out of the end of the coax that would otherwise flow down the outside of the shield. Grounding the pcb keeps it at a low RF voltage even when feeding a high impedance load, if the ground is effective at the frequency in use. 73, Ron AC7AC On 6/8/2017 11:47 AM, Terry Brown wrote: > I have the BL2 Balun and use it for balanced lines to Coax. Occasionally, > when I am using a wire and counterpoise to the BNC binding posts, I try to > match a shorter wire for 80 meters than what I really should due to lack of > space in RV sites. I believe I am connecting the Balun correctly; hooking > the long wire to A and the counterpoise to B on the Balun inputs. I can get > a shorter wire to tune that way. > > > > My question is: what is the purpose of the GND connection on the Balun? > Does it need to be grounded when in use? Looking at the circuit diagram in > the manual, I don't think the counterpoise should be attached to the ground > connection? > > > > I'd be interested in how others hook up their BL2 Baluns. > > > > Thanks and 73's, > > > > Terry de N7TB > > _ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] QRP and Camping/Back packing in the Bay Area
Quite so. It's been a number of years since I drove up and down that mountain several times a week servicing repeaters for General Communications Engineering, but there were also a number of repeaters there in the old Land Mobile frequency range of 30 to 50 MHz as well as the VHF and UHF repeaters. Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Kane Sent: Tuesday, June 6, 2017 2:56 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] QRP and Camping/Back packing in the Bay Area On 6/6/2017 2:32 PM, Chris Tate - N6WM wrote: > Ya no campfires.. but this is a good time for Juniper campground at Mt > Diablo.. get some elevation on that qrp signal.. SOTA W6/CC-045. > you can drive right up to your camp area.. But be aware that Mt. Diablo is "RF city" with all the communication sites up there on both North Peak and South Peak. (I used to maintain one.). Not much HF if any but plenty of VHF, UHF, and microwave. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 >From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@cobi.biz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] QRP and Camping/Back packing in the Bay Area
For a combination of campfires and great operating environment you might look into one of the beaches on the coast, such as New Brighton State Park in Capitola, just south of Santa Cruz on the Monterey Bay. You probably won't have any issues with a campfire in the locations designated for camping and it's hard to beat the effects of that huge, unobstructed ground plane to the west that we call the Pacific Ocean. I'm sure there are many other camping beaches that a little on-line research will turn up. It's been a couple of decades since I lived in Capitola. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Satterwhite via Elecraft Sent: Tuesday, June 6, 2017 1:27 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] QRP and Camping/Back packing in the Bay Area Hello everyone, I'm looking to go camping or Backpacking this weekend with my QRP set up and have some fun. Not to sure where a good place is in the Bay area or surrounding areas for that would be. I would prefer to get away from the crowds, some where I can have a small camp fire, bring my dog, and of course have decent propagation. My short list so far is Mt. Diablo, or Black Diamond mines. Does anybody have any other suggestions? I'm just getting back into the camping/back packing scene and would like to integrate QRP with it! Thanks, Dave KM6P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Using the K3s with a Tokyo Hy-Power HL-1.5KFX amp.
Is there a cable available to allow automatic band switching of this amp from the K3s?(Or advice on how to make one up.) The amp and rig work well together, but automatic band switching would be nice! The only reference I have found online refers to adding pull up resistors to the (older) K3 board. (KI03?) Thanks for any suggestions. Ron WA2EIO. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] August 21st Eclipse Net?
Isn't that simply focused on WWVB propagation to see the effect on VLF signals? 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Tom Francis, W1TEF Sent: Friday, June 2, 2017 12:20 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] August 21st Eclipse Net? There is a plan to have study the effect. http://eng.umb.edu/~eclipsemob/ Tom, W1TEF Lexington, SC On 6/2/2017 2:54 PM, Bruce Beford wrote: > Does anyone know of any plans for any HF nets that will be running > specifically for observers of the Solar Eclipse on August 21st? I plan > to travel to Nebraska for the event, and will have radios with me (of > course.) Bruce Beford, N1RX > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > kx2_...@swsports.org > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX2/3 Amplifiers
The writer of the manual has a sense of humor. You can download the manual, and on the last page of the "Troubleshooting" section the last problem listed is: "Smoke comes from unit," and the solution, "Replace the smoke...only kidding, return to dealer." On 5/28/2017 7:15 PM, pkhjr via Elecraft wrote: Just ran across this the other day. Anyone know have any experience with this amp? http://www.ebay.com/itm/Xiegu-XPA125-QRP-ALC-Antenna-Tuner-Function-125W-HF-Ham-Radio-Power-Amplifier-US-/132206081348?hash=item1ec818b544:g:cVQAAOSw9OFZKOkD 73 Tex ka5y -- View this message in context: http://elecraft.365791.n2.nabble.com/KX2-3-Amplifiers-tp7631213p7631225.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa2...@optonline.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPAIO3 modification - E740287
Hi Alan: Use Rev B. Rev A of the instructions had an error that was corrected by an errata. Apparently you don't have that errata. The change was subsequently included in the Rev B printing. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of G4GNX Sent: Sunday, May 28, 2017 5:53 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KPAIO3 modification - E740287 I'm in the process of upgrading our club's K3, new synth, DSP and a stack of small mods. I've come up against an issue that's causing me some confusion. The mod for the KPAIO3 consist of a small electrolytic capacitor soldered to two pins on the KPAIO3 module. I have two versions of instructions, one dated April 13 2016 - Revision A and the other dated August 10 2016 - Revision B. I presume that Rev B supersedes Rev A, so I should follow Rev B? The images on both sheets appear to show the KPAIO3A module, but describe the KPAIO3 module, so I presume for the purpose of modding they're the same, however the Negative lead of the new capacitor is shown going to different points on the module, depending which instruction sheet is viewed and looking at the trace layout on either, this doesn't make sense. Besides that, the trace layout on the module that I have is different to both of the paper descriptions. Can anyone shed any light on this conundrum or know if any addendum has been issued? 73, Alan. G4GNX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] List overload - Additional
Harry I would respectfully disagree with some of your post. Because of questions from others I have learned a lot about using antennas with my KX2 while camping, I have been able to investigate side products that work with my K3s and have purchased a few of them and they have enhanced my operating with my rigs. I would not have known about them otherwise. I have seen posts about some RFI and followed some suggestions that has helped reduce my RFI. These may not have been directly elecraft products but they have really helped me. Some forums are too strict for me and not very friendly, this one has just the right balance for me. Not having an electronics background I have learned a lot. It reminds me of another forum I really like, DXlab where no question is to be slighted, and it is a very open learning format. I feel the same about this one. Nurturing a learning environment for all in the hobby who buy elecraft, to me, is important.There have been a few threads that should have been stopped and were. Being offended easily, being grumpy, or unwilling to entertain other's views is not needed. I find it very easy to delete posts I do not need. I hope you stay on because it sounds like you have experience and can help others who might be new or not have a technology background. Have a great day. Today is a good day to have a Great Day! 73 Ron Wilcox KF7ZN RN, BSN Secretary Utah DX Club ARRL & W5YI VE ARRL Instructor On Sat, May 27, 2017 at 11:38 AM, Rose wrote: > Actually Harry, how else would an owner of Elecraft equipment easily become > aware of what's available? > > No different than a vehicle vendor offering floor mats manufactured by > another vendor. > > Two after-market vendors come to mind that are Elecraft-specific, and are > occasionally "plugged" by list members. > I purchased their products after becoming aware of them on the list. Much > more efficient than a Google search. > > FWIW ... > > K0PP > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rgloga...@gmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] LiIon types, and safety (was: Fire in the house li-ion)
I have found that having a KXBT2 around is very handy in the shop. If I have the K2, K3, KX3 or other 13V rig on the bench and want to power it up for checks, to run an alignment, etc., I just plug in the KXBT2. -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Stephen Prior Sent: Wednesday, May 24, 2017 3:08 PM To: Wayne Burdick Cc: Elecraft Reflector Subject: Re: [Elecraft] LiIon types, and safety (was: Fire in the house li-ion) Which is why I've given up on homebrewing an extra pack - albeit for external use - I have bought another KXBT2! 73 Stephen, G4SJP On 24 May 2017 at 22:01, Wayne Burdick wrote: __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Clever K3s cooling scheme?
Right, Roy. It's a whole different cooling system. The K2 has an EXTERNAL heat sink. The fan assists by cooling the components inside the KPA100 amp, pushing air in across the components and out through holes around the forward edge of the heat sink. The heat sink fins are on top of the K2 in open air. As you note, the fans exhaust warm air from the heat sink inside the K3 out through the back. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Roy Koeppe Sent: Wednesday, May 24, 2017 5:36 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] Clever K3s cooling scheme? Re all the fans postings, it appears my K3s uses convection cooling during light usage periods, drawing air in at the rear, backwards thru the idle fans, and out the top. When fans engage, air flow is reversed...drawn in thru the top and out the back. "Simplicity is ingenuity." 73, Roy K6XK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] BL2 -- Antenna Balun Usage
It is useful to remember that a so-called "balun" is nothing more than a length of transmission line - most commonly parallel wires. The line needs to be long enough to have sufficient inductance to produce balanced currents at the terminated end. Greater inductance is achievable by winding the transmission line into a coil, and even more if that coil has a ferrite core. So, as Bill notes, the impedance it presents to the source (your rig) will vary based on the impedance of the load, just like any other transmission line. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Leonard N0CU Sent: Monday, May 22, 2017 12:42 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] BL2 -- Antenna Balun Usage I am no expert when it comes to baluns, but here are several comments that are based upon some research that I have recently done on the subject: 1) Now, unlike in the past, the most commonly used balun is the current balun. Most current baluns use some type of transmission line (if they do, they are called transmission line transformers). If the load on a balun’s output does not represent a 1:1 SWR for the balun, the impedance measured at the input of the balun will be close to the balun load impedance only when the electrical length of the balun’s line is a multiple of an electrical half wavelength. I suggest that you try putting 25 ohm and 100 ohm resistive loads on your baluns and see what you measure at the input. The BL-2 uses a relatively short length of coax (~12 in I believe), however, 12 in of RG58 will show 80+j33 at its input at 30 MHz when terminated with 100 ohms (using TLW). My high power DXE 1:1 current choke (balun) has a much longer length of coax than the BL-2. It reads 43 +j32 ohms at 30MHz with a 25 ohm load (measured with a VNA 2180 network analyzer). If you can determine the length and type of coax in the balun that you are using, you can use ARRL’s TLW software to estimate what the actual balun load impedance is by inputting the line parameters and the impedance you measure at the balun input. 2) What happens to balun performance as the SWR increases is a question that I have yet to find an answer to. I am not aware of any balun manufacturer that attempts to quantify this behavior with any spec. There seems to be general agreement that baluns do not like highly reactive loads. 3) Balun heating is a complex issue that many “experts” don’t agree on. Looking at it simplistically, there are two sources of heating in current baluns (voltage baluns are very different than current baluns when it comes to heating). The first source of heating is the loss in the transmission line used in the balun. If a short length of high quality coax is used, the loss (ie, heating) should be relatively small. However, the confined space and poor heat transfer in the balun housing could mean that even a small amount of loss can be problematic in a poorly designed, high power balun. What many “experts” don’t realize is that the normal (differential mode) signal flowing down the coax does not cause any heating in the ferrite core in a current balun (this is not the case with a voltage balun). This is because this signal is completely contained between the outer surface of the center conductor and inner surface of the shield in the coax. What does cause heating in a current balun is the common mode current flowing on the outer surface of the shield on the coax used in the balun. This is the unwanted current that the balun is intended to reduce. Also, a number of articles claim that ferrite core temperatures can reach critical values (where the core fails) well before the core saturates and thermal runaway occurs. 4) Heating from common mode current is another area where the “experts” don’t agree. Heating due to common mode current is a function of transmitter power, design of the balun (ie, type of core, core size/mix, style of balun, heat transfer of housing, balun load impedance, etc) and the “system” issues that affect the balun’s performance. Depending on the values of the important system parameters, adding a balun can either increase, decrease, or have no effect upon the common mode current flowing on a transmission line. The common mode current and the resistive component of the balun’s common mode impedance are critical factors that determine the amount of heating in the balun’s ferrite core. A surprising number of “experts” make claims for power handling capabilities of various types of baluns without even mentioning the importance of these “system” issues. Tom Rauch (W8JI) and Tom Thompson (W0IVJ) have written articles that use EZNEC to quantitatively show the importance of these “system” issues when it comes to estimating common mode currents on transmission lines. However, as enlightening as these articles are, I am doubtful that EZNEC can be used to accurate
Re: [Elecraft] Hallicrafters HA-1
Are you using Mode B? I believe the Elecraft rigs default to A which is the Curtiss system. It drives me nuts but Mode B works beautifully on this "Accu-keyer" operator. BTW, in the Boy Scouts I tried unsuccessfully to decode by sight. Guess I was no better than the guy on the Carpathia who was unable to decode "This is the Titanic. Come quickly. We are sinking". He finally decided the mast light was defective. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes Stewart Sent: Sunday, May 21, 2017 6:05 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Hallicrafters HA-1 I'm approaching my 60th year in ham radio and have a confession; I learned Morse with my Boy Scout Handbook (still have it) by sight not sound. Consequently, I've never been a very good CW op, although I have a 20 WPM Extra license. As a Novice I used a Western Electric "Pole-Changer" straight key given to me by a non-ham retired telegrapher friend, (That's still on the operating desk). I never even tried a bug, but when I built my first Accu-Keyer I finally had some help. I used it with a number of rigs and when the Accu-Memory came out I was in heaven. I build two of them at first and gave one to my friend George Badger, W6TC, who liked it too. Then I built a third one for the heart of my meteor scatter/EME station. With several handfulls of TTL logic I added a timer/sequencer that used the power line as a time base to automatically control the station on the various sequences used for MS and EME. Preamp switching/relay delay, TX delay, etc were all timed by the keyer and the "canned" messages were in memory. All I had to do was listen and select the next message as the QSO progressed. (That one is still in my storage building too.) Among its wonderful ergonomics the TS870 that I had before buying a K3 was an Accu-Keyer emulation. I never had trouble sending CW with that rig. Enter the K3 (and now a K3S). I can't even send my call gracefully. I was prepared to buy the Idiom Press unit when they went out of business. I would love Accu-Keyer emulation in my K3s. Wes N7WS On 5/15/2017 12:57 PM, GRANT YOUNGMAN wrote: > This is one of the things that has always bugged me about internal rig keyers > (Elecraft included). And as as result, I’ve almost never used them. I’ve > been using an Accu-Keyer (or emulator) for so long that nothing else is > comfortable. > > I moved from my original home brewed Accu-Keyer (which I still have, refuse > to part with, and occasionally use) to the enhanced Accu-Memory version, to > an MM-3 (with emulation — and still one of the best stand-alone keyers ever > made) to the Idiom Press CMOS 4 (with emulation) because of its small form > factor. > > It seems that something as basic as Accu-Keyer timing with auto-character > (and even auto-word) space isn’t exactly “rocket science”. So how about it > Elecraft? Accu-Keyer emulation would make a better than run-of-the-mill > update!! For the K3, KX3, KX2. And I wouldn’t have to carry the CMOS 4 in > my KX3 bag or fiddle with more cables on the table with the K3. I’m probably > not alone here, given the popularity of the Accu-Keyer. I can send better CW > with a bug than I can with paddles and an electronic keyer that lacks ACS. > Maybe it’s my (old) age or just practice ... :-) > >> But - it didn't have auto character spacing which came out with the >> WB4VVF Accu-Keyer (hint-hint - so it's not OT after all). >> > Grant NQ5T > K3 #2091, KX3 #8342 > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2/100 overheating?
Don: I guess you never noticed my response to Ken that I posted last Friday. The fan moves air INTO the K2, across the PA and it comes out around the heat sink fins near the front of the K2, just as George said. I suggested Ken contact you after he determined that he had in fact set the bias current correctly and the fan was operating correctly because you work on K2s quite often. It's been five years since mine was apart! 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Sunday, May 21, 2017 6:19 PM To: George Winship, NC5G; elecraft@mailman.qth.net Subject: Re: [Elecraft] K2/100 overheating? George, I will check the fan air flow direction tomorrow because I am uncertain. If you have the label out and the wires on the correct holes, yours is likely OK. There are 2 philosophies about the fan direction. One is that you should exhaust the heat and let the assembly draw cool air across the hot components. The other says to let the fan "blow" on the hot components. The major difference between the two is that a blower fan adds heat to the air (due to the work produced by the fan), but adds the benefit of directing the air flow to the area to be cooled. An exhaust fan does not add its work product heat to the air being moved, but the cool air cannot be directed as well because it is spread over a large area in the enclosure box. 73, Don W3FPR On 5/21/2017 11:26 AM, George Winship, NC5G wrote: > Interesting. I built my K2/100 about 17 years ago and the fan has always > drawn air into the cabinet and exhausted over the heatsink. So, I rechecked > the manual and disassembled my rig to check for proper assembly. Fan label > is facing out and wires are soldered to the right pads(red=+, black=-). Was > there maybe a change in later models? > > 73, George > > > > Make certain the fan is mounted with the label out and that the red wire > is in the +hole and the black one in the -hole. > The fan should exhaust the hot air. Cooler air flows in at the front of > the heatsink. > > > > > > > > -- > View this message in context: http://elecraft.365791.n2.nabble.com/K2-100-overheating-tp7630828p7630883.ht ml > Sent from the Elecraft mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to donw...@embarqmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Beam antenna question
I don't have a Hex beam, but for my wire antennas strung in the trees I use this stuff: https://www.dxengineering.com/parts/syn-dbr-187-500?seid=dxese1&cm_mmc=pla-g oogle-_-shopping-_-dxese1-_-synthetic-textile-industries&gclid=Cj0KEQjw0v_IB RCEzKHK0KiCrKMBEiQA3--1NnAInx_Rd5SOr2M6T-EFGXAMt2kyFHAtRWJdawQOdhAaAsN58P8HA Q It has survived nicely holding up a wire antenna for ten years so far in high winds, sunshine, rain, snow, and freezing weather. It's hard to imagine that a Hex beam would put more strain on it. However, I am in Oregon. The rope is advertised as UV resistant but we don't get nearly as much UV as some other areas. (Sunblock salesmen go broke around here.) 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Vic Rosenthal Sent: Saturday, May 20, 2017 12:35 PM To: Joe Subich, W4TV Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] Beam antenna question Why do you think it will "significantly outperform the hex beams?" The point about uv is well taken re fiberglass, but I don't know what the cords on all the hexbeam versions are made of. There are uv resistant materials available. I wouldn't say an 11 element yagi with capacity hats on the elements has an especially low visual profile! Vic 4X6GP > On 20 May 2017, at 19:36, Joe Subich, W4TV wrote: > > On 5/20/2017 11:32 AM, Terry Brown wrote: > > These beams are not cheap, I don't want to be taking the beam down > > and replacing main structural components every 5 yrs. > > > > Can anyone with a hex beam comment on this? > > Your concerns are well placed with antennas made of fiberglass and > dacron/kevlar cords. > > Instead of a hexbeam, I would recommend looking at the Innovantennas > XR5T: > <http://innovantennas.com/antennas-a-accesories/on-line-shop/view/prod > uctdetails/virtuemart_product_id/435/virtuemart_category_id/55.html>, > or the JK Antennas Navassa 5: > <https://jkantennas.com/jk-navassa-5.html> > > Both have boom lengths of 12 feet or less, cover 20 - 10 meters and > have optional 6 meter add-ons. Either should significantly out > perform the hex beams and - since they are aluminum antennas that do > not use UV sensitive fiberglass, kevlar and dacron components - should > significantly outlast the hexbeam with significantly less maintenance. > > 73, > > ... Joe, W4TV >> __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@cobi.biz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Beam antenna question
Any horizontally-polarized antenna needs to be at least 1/2 wavelength above ground for optimum performance, e.g. 32 feet up on 20 meters, 16 feet up on 10 meters. They will work at lower heights of course, but at reduced gain as they are lower. 20 feet sounds like a reasonable compromise for a 14 MHz and up antenna, especially since the actual apparent ground is usually somewhat below the surface of the earth in most locations. 73, Ron AC7AC -Original Message- I have also read they only need to be up about 20 feet high. Rich, n0ce __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Fire in the house li-ion
I've yet to have a failure either. My interest was in whether the bags really do the job they are supposed to do. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Terry Schieler Sent: Friday, May 19, 2017 11:09 AM To: 'Ron D'Eau Claire'; 'Bill W4ZV'; elecraft@mailman.qth.net Subject: Re: [Elecraft] Fire in the house li-ion No, I have not seen any fire, smoking or dangerous issues, Ron. But I always use the recommended chargers and charging formats. I always charge them in the fire bag and never indoors or unattended. Like anything else that's dangerous, they demand respect. 73 Terry W0FM -Original Message- From: Ron D'Eau Claire [mailto:r...@cobi.biz] Sent: Friday, May 19, 2017 12:42 PM To: 'Terry Schieler'; 'Bill W4ZV'; elecraft@mailman.qth.net Subject: RE: [Elecraft] Fire in the house li-ion Have you ever had a battery failure and fire in one of them? The ones I've seen on line that state they are tested under actual failure conditions are more than $500 USD. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Terry Schieler Sent: Friday, May 19, 2017 9:30 AM To: 'Bill W4ZV'; elecraft@mailman.qth.net Subject: Re: [Elecraft] Fire in the house li-ion I have been using charging bags similar to these for over 6 years to charge LiPO batteries for my fleet of RC airplanes. Very prevalent and highly recommended within the RC hobby field. Not necessarily this specific brand, but I've never had an issue. 73, Terry, W0FM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Fire in the house li-ion
Have you ever had a battery failure and fire in one of them? The ones I've seen on line that state they are tested under actual failure conditions are more than $500 USD. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Terry Schieler Sent: Friday, May 19, 2017 9:30 AM To: 'Bill W4ZV'; elecraft@mailman.qth.net Subject: Re: [Elecraft] Fire in the house li-ion I have been using charging bags similar to these for over 6 years to charge LiPO batteries for my fleet of RC airplanes. Very prevalent and highly recommended within the RC hobby field. Not necessarily this specific brand, but I've never had an issue. 73, Terry, W0FM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2/100 overheating?
Hi Ken: The fan should be drawing air IN, not blowing it out. Is it oriented correctly (label out) and wired correctly? Normally the K2/100 at full 100 watts out for a long time before the temperature gets too high. I did some thermal testing some years ago that had a brick on the key up to half an hour at a time. Did you carefully set the transmit bias current as described in the assy manual? See page 51 of the current (Rev H2) manual. Excessive bias current will certainly result in excessive heat. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of N4KS via Elecraft Sent: Friday, May 19, 2017 5:01 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K2/100 overheating? I recently added the KPA100 to my K2. The heat sink gets VERY hot at any power level above 11 watts (that's when the amp kicks in). The fan is running at high speed and pulling air OUT of the box. Just wondering if this is normal. Ken/N4KS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT -- Ham radio operators contribute to protecting the Earth
Very interesting Phil thanks, but I believe there were far more VLF and MF transmissions back in the time period from 1900 to 1940 than there are today. For a long time it was believed that longer wavelengths (lower frequencies) were essential for long-range communications. That is why shipboard communications and point-to-point communications were focused on the frequencies below 450 kHz - the lower the better. The AM "standard broadcast band" was established in about 550 to 1600 kHz believing that those frequencies were only useful for short ranges up to a few tens of miles, which is what the commercial broadcast station allocations were designed to serve. Of course us Hams were given use of the shorter wavelengths (200 meters or less in wavelengths - or about 1600 kHz or above in frequency) because it was "obvious" someone would be lucky to communicate across a small town with them, if that far. And then that all changed when a few Hams broke away from QRMing each other on 200 meters and started exploring the shorter wavelengths. Now there is comparatively little going on down there. As the article mentions, submarine comms are at VLF. Low powered aircraft beacons, some GPS correction beacons (also low powered) and some Ham activity under the special licenses. I haven't listened down there in a while but that's all that comes to mind. So the source of the "bubble" mentioned in the article seems a mystery -- or is it something that has been there since Marconi launched the radio business and is now just being noticed? 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Hystad Sent: Thursday, May 18, 2017 5:23 PM To: elecraft Subject: [Elecraft] OT -- Ham radio operators contribute to protecting the Earth I thought some other ham operators might like to read how they are helping to build a protective bubble around the Earth. https://www.theatlantic.com/science/archive/2017/05/wow-guys/527193/ 73, phil, K7PEH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Fire in the house li-ion
Ouch, Fred!
One of the standard airline emergency procedures for a smoking/burning/fizzing
phone or other personal electronics is to submerge it in water or wrap wet
towels around it to reduce the temperature and keep it from igniting nearby
flammable materials.
It's my understanding that the weakness is more mechanical than chemical. You
may know that the insulation within modern Li-Poly (and similar) battery cells
is in the order of a few molecules thick. If you could see the insulating layer
with your naked eye, such an insulator next to a human hair would have the hair
looking like a mountain range by comparison.
Once one insulator is breached for any reason, the heat released is usually
sufficient to cause other inter-cell insulators in the pack to breach in a
cascading effect that releases all the energy within a few seconds, hence the
heat and if anything even slightly flammable is near it, flames, smoke and
gasses.
It all comes down to the care with which the battery was assembled and tested,
and the care with which it is used - not overcharging it, not subjecting the
battery to excessive shock, etc.
While I have some of those batteries in my cameras, personal electronics, etc.,
they are never stored or charged near anything won't burst into flames even if
subjected to molten iron for half a minute or more.
A good friend often describes cellular phones as a 'great technology that
ALMOST works'. I put modern high-energy capacity batteries in the same
category.
73, Ron AC7AC
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred
Jensen
Sent: Thursday, May 18, 2017 11:05 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Fire in the house li-ion
I was using a tiny Li-Poly pack about the size of a small matchbox that I got
from the local RC model store with my KX1 when it began to smoke.
Fortunately,I had it on a pigtail, was out on the deck in a Spartan Sprint, and
could unplug it and fling it over the railing to the gravel driveway.
There were no flames or major explosions, but there were a lot of sparks and
quite a bit of smoke for such a small package. The pyrotechnic display went on
for perhaps 40-50 seconds, followed by some low-key fizzing and popping. It
left a burned mark in the gravel when it was cool. NOTE: This happened while
discharging the battery, and I wasn't transmitting at the moment.
I struggled through required Chemistry in college, but I did learn enough about
that particular column in the Periodic Table to avoid getting the hose. [:-)
I have always charged all of my lithium-ish batteries outside from a solar
panelso they contain only green and no brown electronsfor events where that
matters. I usually put the battery in a metal coffee can.
Ibelieve, but do not know for sure, that LiFePO4 chemistry is quite a bit more
stable than others.
73,
Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn
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Re: [Elecraft] Fire in the house li-ion
That is a great warning William. It is good to hear the animals and people got out safely. As with so many things, all it takes is one bad unit to create a disaster. I see it was a Go-Pro battery. Is there a make or brand name other than Go-Pro on them? Dat is een grote waarschuwing William. Het is goed om de dieren te horen en mensen komen veilig uit. Net zoals bij zoveel dingen, is het maar een slechte eenheid om een ramp te maken. Ik zie dat het een Go-Pro batterij was. Is er een merk of merknaam anders dan Go-Pro op hen? 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of William Lagerberg Sent: Wednesday, May 17, 2017 2:30 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Fire in the house li-ion Guys, I want to give you a advice, my shack it (was) in the basement (cellar??) I do all my thing for the hobby there. A collega of mine asked me to take a look at two Go-Pro LI-Ion accu's because they where not loading anymore. So I put the first one on the loader for 8 till 9 hours and checked it and it was ok ( with 10% loading current) Then I dit put the second one in same place at 10 in the morning at 3 my daughter called me there is a fire. We rusted to the cellar but I could not enter it was filled with dark smoke. My shack is gone and 90 % off my house, I have insurance don’t now if it is enough to cover all of my Elecraft stuff My K1, my own build K2 my K3 and my KX3 are gone, I found my K1 in 20 cm off water really down under, I clean’t it with fresh water. After that flushed it with pure alcohol. It is completely taken apart today as far as is possible. I Hope it will survive I will let it dry for a lot of day’s My K2 is melted the same as my P3 and my K3 perhaps I can order the outside of both, but a am still not allowed to enter the basement so I don’t know how it looks at the inside. So finale the message is please take care with li-ion accuse battery’s. It did cost me our house in 1 hour. http://www.nhnieuws.nl/nieuws/206119/bewoner-vlucht-met-dieren-pand-uit-vanwege-grote-brand <http://www.nhnieuws.nl/nieuws/206119/bewoner-vlucht-met-dieren-pand-uit-vanwege-grote-brand> Regards William Pe1bsb __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Strange SWR change on 20 at
Hi Dave: I thought you said it happened after you sent CQ+Call a few times. When a core heats to its Curie temp, the inductance change happens "instantly". You are right - if it happens instantly when you hit the key it is not heating. Something is breaking down. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave Cole Sent: Saturday, May 13, 2017 10:39 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Strange SWR change on 20 at I added the SWR meter... My actual SWR jumps instantly up about1 SWR unit... I believe it is a bad connection on the Challenger where the main antenna connects to the 20 meter tuning stub... Just sort of surprised me to see a second person with the exact same issue is all... SWR change is instant, so it is not heating... Happens at 30 watts, or 1 KW... Time for a rebuild. 73s and thanks, Dave NK7Z http://www.nk7z.net On 05/13/2017 10:07 AM, Dave Cole wrote: > Hmmm... I am having the exact same issue... My SWR changes after a > few transmissions, then returns... Up until now, I have been > suspecting my antenna... Time to add an external SWR bridge between > the tuner and antenna as a permanent thing... > > 73s and thanks, > Dave > NK7Z > http://www.nk7z.net > > On 05/13/2017 09:07 AM, Terry Brown wrote: >> I recently started using my horizontal loop that is about a full >> wavelength on 80, for 20 meters. I took down my yagi as we are >> moving; drat! My Horizontal Loop is at 40 ft. height and fed with >> 450 window line into a 4:1 voltage balun with about 15 ft. of coax to >> rig. >> >> >> >> I am running 100 watts through my KXPA100. I tune a frequency in the >> CW portion of 20 to about 1.2 :1 and start sending CQ. After about 3 >> to >> 4 3x3 >> CQ's,, the SWR goes off the charts and power drops to zero. I can >> retune >> the antenna and the process repeats itself. 20 meters is the only >> band affected. >> >> >> >> I am wondering if I am having RF problems in that part of the 20 >> meter bands This only occurs on 20 meters. The Amp is grounded, but >> the KX3 is not bonded to the Amp. >> >> >> >> I would appreciate any advice. >> >> >> >> Thanks and 73's, >> >> >> >> Terry de N7TB >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net Please help support this >> email list: http://www.qsl.net/donate.html Message delivered to >> d...@nk7z.net >> > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > d...@nk7z.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@cobi.biz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Strange SWR change on 20 at
It sounds to me like Bill has the answer. As the torodial core heats up it eventually reaches its Curie temperature at which its magnetic properties (and so inductance of the coil wound on it) changes dramatically. If the torodial core doesn't get so hot it cracks, it will return to "normal" when it cools. Personally, I like air wound coils wherever there may be a wide range of impedances. Air wound coils are bigger, but air does not saturate and dissipate RF as heat. All one needs to worry about with air wound coils is big enough wire to avoid excessive resistive losses at high RF currents and sufficient spacing to avoid arcing or corona discharges when the RF voltage is high, but torodial inductors have the same issues was well. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Nr4c Sent: Saturday, May 13, 2017 10:19 AM To: Terry Brown Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] Strange SWR change on 20 at What's the antenna impedance before the ATU is activated? You may be heating up the BALUN due to big mis-match. Sent from my iPhone ...nr4c. bill > On May 13, 2017, at 12:07 PM, Terry Brown wrote: > > I recently started using my horizontal loop that is about a full > wavelength on 80, for 20 meters. I took down my yagi as we are > moving; drat! My Horizontal Loop is at 40 ft. height and fed with > 450 window line into a 4:1 voltage balun with about 15 ft. of coax to rig. > > > > I am running 100 watts through my KXPA100. I tune a frequency in the > CW portion of 20 to about 1.2 :1 and start sending CQ. After about 3 to 4 3x3 > CQ's,, the SWR goes off the charts and power drops to zero. I can retune > the antenna and the process repeats itself. 20 meters is the only > band affected. > > > > I am wondering if I am having RF problems in that part of the 20 meter > bands This only occurs on 20 meters. The Amp is grounded, but the KX3 > is not bonded to the Amp. > > > > I would appreciate any advice. > > > > Thanks and 73's, > > > > Terry de N7TB > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > n...@widomaker.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@cobi.biz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] New Product Announcement
I second Howie's comments on Rose's bag's quality and capability. The LowePro is really a camera bag, and in fine Ham tradition we have adapted it, but Rose's was designed specifically for radio work. Ron. WA2EIO On 5/13/2017 8:56 AM, Howard Hoyt wrote: Hi Chris, The CS60 LowePro case I have seems well made, but having owned a Rose's bag for my KX3 for years, I can wholeheartedly recommend them! One thing about the LowePro case, it is obvious studying the internal layout it was not designed for holding ham gear. For instance, the lid of it begs to have stuff stored in the little pockets...but then they bang against the face of the KX2. When you order a case from Rose, you get to customize it any way you want, and she has made so many cases her recommendations are spot on as well. And, her workmanship is superb...I have dragged that poor KX3 and case over hill and dale for years now and it has not yet popped a stitch or torn anywhere..amazing quality. Just my $0.02 worth... Cheers & 73, Howie - WA4PSC On 5/13/2017 2:34 AM, Chris Tate - N6WM wrote: Howie, thanks as always for your prompt response, and yes much of what you say makes sense. For me, the KX2's small size is its true market value. It's a rig that can be taken everywhere and anywhere, and is easily explained in most odd customs situations particularly in carry on scenarios. Its portability is key. I imagine with the right case there is not an issue I of course purchased the smallest of cases and have managed to cram the radio, along with reasonable antennas for 20m up into the case along with the rig. Its really the antennas and not the radio that are the problem at this point. Perhaps I will research better cases, and perhaps so discussions with Rose are in order as well (thanks for your email as well Rose). Just trying to keep everything as compact as possible. Truly a wonderful group of supporters out here!! Chris N6WM -Original Message- From: Howard Hoyt [mailto:hh...@mebtel.net] Sent: Friday, May 12, 2017 2:57 PM To: Chris Tate - N6WM ; Elecraft Reflector ; k...@yahoogroups.com Subject: Re: [Elecraft] New Product Announcement Hi Chris, I bought the LowePro CS60 bag from Elecraft, and with the Kx22 and GEMS handle and cover on it, the KX2 fits fine in the bag. It is true that the handles and cover stick up 1/2" farther than the knobs, but as you point out, with the cover the knobs and display are protected, and the CS60 bag still zips shut without any fuss. It is just my personal preference, but given the LowePro bag is soft-sided and offers little impact protection, I strongly prefer to have the GEMS cover in place when traveling with the $800 KX2, it is inexpensive protection for sure! All this being said, if we get enough requests for a heatsink without the handles I am sure we can do it. Cheers & 73, Howie - WA4PSC www.proaudioeng.com On 5/12/2017 5:24 PM, Chris Tate - N6WM wrote: Howie are you guys gonna make one without the protective handles? Just wonderin.. its gonna be hard to stuff it into the stock bag, heatsink may fit but definitely not the handles. I am sure they are great for added knob protection just unfortunately at the expense of the travel footprint. not a gripe.. just a friendly observation. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa2...@optonline.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Looking for Oregon/Idaho Eclipse accommodation
Here on the Oregon Coast overcast is common, particularly before noon. The National Weather Service currently predicts we have a 64% chance of overcast skies on August 21st, at least in the morning hours. If we get to see any more than a darkening of the sky, we will consider ourselves lucky. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of kev...@coho.net Sent: Sunday, May 7, 2017 4:51 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: Looking for Oregon/Idaho Eclipse accommodation Oregon's weather is pretty predictable. August is in our dry season. It is very rarely cloudy let alone is the weather inclement. There is a very high chance of it being clear during the eclipse. 73 & Clear Skies, Kevin. KD5ONS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] VHF+UHF Radio Wish List
I suspect he meant Power Amplifier (PA) not PS. Such is the danger of acronyms. They can start wars! 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Nr4c Sent: Saturday, May 6, 2017 6:53 PM To: Clay Autery Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] VHF+UHF Radio Wish List What PS? Sent from my iPhone ...nr4c. bill > On May 6, 2017, at 8:27 PM, Clay Autery wrote: > > Nice idea Once the 15dB limit is removed, you can use the 10 watt > to drive the KPA1500 or (gain limit modded) any amp you choose... > > If you found a dead 100W K3 PS, you could use the bracketing, back > panel, et al as needed... Lot of room if you dump the PS... > > __ > Clay Autery, KY5G > MONTAC Enterprises > (318) 518-1389 > >> On 5/5/2017 7:23 PM, Harry Yingst via Elecraft wrote: >> At one point I considered taking a K3/10 and installing Transverters where >> the PA deck would go. >> >> >> >> From: Bill Johnson >> To: Phil Hystad ; Elecraft >> >> Sent: Friday, May 5, 2017 7:17 PM >> Subject: Re: [Elecraft] VHF+UHF Radio Wish List >> >> Phil, >> >> Wayne and Eric are smart dudes, for sure. I don't know that they are into >> VHF, UHF to the degree needed to do what you ask. They do have a team of >> engineers, also very bright and HAM interested, so the request may >> eventually take hold. I would love a K2 or K3 style platform for VHF, UHF >> based on the Elecraft design features to include features such as full >> duplex, etc. I don't know what the market for such equipment might be, but >> they might wish to respond to our interest?! I would enjoy such equipment >> and they could allow space for modules to be added which would include even >> higher freq stuff for those who wanted it. >> >> 72 & 73, >> Bill >> K9YEQ, FT’er for K2, KX1, KX3, KXPA100, KAT500, W2, etc. >> >> -Original Message- >> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of >> Phil Hystad >> Sent: Friday, May 5, 2017 12:36 PM >> To: Elecraft >> Subject: [Elecraft] VHF+UHF Radio Wish List >> >> I was planning to ask a question about the 2-meter option board for K3/K3S >> but thought to ask this question instead. >> >> Has there ever been interest (by others of this forum) or discussion from >> Wayne & Eric about a new radio, one specifically dedicated to VHF and UHF >> with satellite comms (Doppler) and other features. I am thinking of >> possibly a three band radio but at least two (2 meter, 70 cm) and optionally >> 1240-1300 MHz. All mode of course! 10 to 15 watts output would be all that >> is necessary (IMO). >> >> There are other radios on the market but they all have one thing in >> common as __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out
An intermittent or open circuit problem that has occurred on occasion is caused by misaligning TMP male and pressing it too hard into the socket. What can happen is that the male pin hits the metal edge of the female socket inside the connector and actually pushes the metal socket out of its housing. The result is that the female socket edge is just resting against the male pin rather than having the male pin inside the socket even though the connector appears properly mated. This results in an intermittent contact. The solution is to visually inspect the various TMP connectors on the KRX3 board as well as those on the KREF3 and Aux KSYN3 board. Looking into the socket you should see the metal receptacle inside the white plastic (Teflon?). IF all you can see is plastic, you may have pushed the metal socket back out of the connector. You can get access to the back of the connector and push the metal receptacle back in place but it will likely tend to bend again more easily now that it has been pushed out of place once. Be especially careful of it when plugging in the TMP cable. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of la3rk Sent: Thursday, May 4, 2017 12:32 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 with subrx - intermittent main RX problem and pwr out I have a K3 approx 8 years old. Fully equipped with subrx, 100W PA, antenna tuner and in/out module. When I connect the subrx, the main rx sometimes loses signal and at the same time power out goes to zero. Looking at the diagrams, I suspect there is an intermittent contact problem in relay K1 shown on the SUBIN schematic. This relay is responsible for sending antenna signals to the splitter when using the subrx and also connects the splitter output back to the main rx. The same contacts on the relay is also a path for the low level tx signal. An intermittent contact on this relay and particularly contacts 3-4 could explain the behaviour I see. Has anybody experience relay failures and if yes have they managed to change out the relay? Sending the K3 back to Elecraft is not a preferred option as shipping charges to/from Norway will be fairly expensive. Regards LA3RK - Olaf Devik - 73 de LA3RK Olaf -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-with-subrx-intermittent-main-RX-prob lem-and-pwr-out-tp7630294.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 and Accessories For Sale
I have an Elecraft K3/100-F for sale-the radio is factory assembled and I'm the original owner. The radio is in excellent cosmetic condition and has never been operated out of the shack, around pets or smoke. I recently shipped the radio to Elecraft for migration to a K3S, updates and a checkout. The radio was returned yesterday and is in a sealed box. A letter from Elecraft, dated 24 April 17, states the radio "meets or exceeds all factory specifications". Elecraft options and/or updates include the following: 1. KPA3-F: Antenna Tuner 2. KXV3B-F: RX Ant, IF Out (for P3), Pre-Amps & Transverter Interface (The upgraded board used in the K3S). 3. KSYN3AUPGD-F: Synthesizer board (The upgraded board used in the K3S). 4. 250hz CW Filter. 5. Numerous minor Elecraft installed and documented updates too numerous to list including the "KPOD Ready" modification that provides power to the KPOD via the RJ45 Jack on the bottom panel. The firm price is $2,000 plus shipping. I also have available a PR6 pre-amplifier (replaced by the new KX3VB-F above), the original K3 synthesizer and KX3VA interface boards. Finally, available for sale is a MicroHam Micro KEYER MKII, DB37 cable and other related accessories including keypad and iLink cable for the SteppIR controller. This equipment is also in excellent condition-I'm the original owner. Please inquire regarding pricing. 73//k5mm/ron __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Elecraft Equipment chat group
I've been around this reflector for 17 years - so far - and this issue has come up many, many times. Here are the guidelines Eric posted most recently: "The PRIMARY purposes of this list are to provide a -polite- and enjoyable forum for discussing Elecraft products, share mods, new ideas, feedback to Elecraft, share experiences using our products, troubleshooting ideas etc. "The Elecraft email list server (reflector) is provided to further the discussion of Elecraft products and related items. It serves as a forum for the discussion of both technical and operating topics including product features, construction and debug problems, sharing your enthusiasm and impressions from using our products and more general ham radio related topics of interest to our customers. "(Please -strongly- resist the urge to reply to an OT topic once it has gone to 5 posts. Once it hits ten posts do not reply at all (go off list if you feel the urge to continue.) Also, please do not try to always get the 'last word'.." -- Note there is no prohibition of OT topics, only that the number of posts be kept down. And he specifically makes provision for "... general ham radio related topics of interest..." 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Michael Walker Sent: Monday, May 1, 2017 8:12 AM To: EricJ; Elecraft@mailman.qth.net Subject: Re: [Elecraft] Elecraft Equipment chat group Hi Eric Actually, it doesn't go in in other forums to this extent. And, when it does, it is shut down. This forum is the wild wild west. :) I posted a list of all the forums I am a member of, and they are all focus on their charter. Mike va3mw __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Audio On K3 (solved)
I still sometimes forget to _read_ the front panel display. Not quite the same as the old way of looking at a knob pointer! But the K3s is certainly in a different league from those old rigs. Ron WA2EIO On 5/1/2017 11:44 AM, Bill Frantz wrote: Add me to the idiot group. I was operating from Kings county in the California QSO party on 10M SSB. Someone responded to my CQ and commented that I'd probably get more responses if I was operating USB. Sure enough, I was in LSB. I Thanked him and fixed the problem. I think what had happened is that I had held a button instead of pushing it and switched to lower sideband as a result. 73 Bill AE6JV On 5/1/17 at 7:39 AM, hotrod...@hotmail.com (louis a. ives) wrote: I feel like a idiot, Ted was right upper side band had flipped to lower side band. I guess that you always miss the obvious and make things too difficult when not needed. I need to find why it happened as 15 meter also had flipped. Thanks to all who gave suggestions, I placed those on my "When it don't work" list. --- Bill Frantz| Privacy is dead, get over| Periwinkle (408)356-8506 | it. | 16345 Englewood Ave www.pwpconsult.com | - Scott McNealy | Los Gatos, CA 95032 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa2...@optonline.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Carol Dauer, SK
Thank you for doing that. You do indeed have many friends. Feel free to reach out again to help you through this painful time. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dauer, Edward Sent: Sunday, April 30, 2017 6:39 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Carol Dauer, SK This post is as O.T. as any could possibly be, and selfish to boot; but sending it is of some importance to me. Last week my wife of more than 50 years passed away, after a nearly three-year run battling a very nasty form of cancer. She died, in hospice, comfortable and at peace. I write this because I am trying to fill a vast hole in my life, doing busy-work and settling affairs and, more to the point, corresponding with friends and family. Over the years I have come to regard many of the participants in this reflector as friends, even though I have met in person only three or four. I expect no replies. And if there are any I ask that they be off-line. Thanks for tolerating this personal and maudlin use of the bandwidth. It is hard to say why it mattered, but I felt the need to express my loss. Thanks, Ted, KN1CBR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@cobi.biz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] NVIS HF vs VHF line-of-sight & CB
Ground losses mount rapidly as a horizontal antenna is lowered closer to the earth. So, while the pattern may show the main lobe straight up, the amount of RF lost in the earth below increases. EZNEC confirmed to me that about 0.2 wavelengths up is the optimum height for the strongest vertical lobe (NVIS pattern). That fits with the fact that 0.2 wavelength spacing between the driven element and reflector of a Yagi produces the maximum gain. Running a wire near the ground helps too, since the earth is, at best, a poor dielectric instead of an efficient reflector. Well supported towers have withstood some serious quakes, including our land-mobile repeater towers in the Loma Prieta earthquake that broke the S.F. Bay bridge and knocked down a good part of downtown Santa Cruz back in the 80's. However a tower, no matter how robust, is of little use if operations need to move elsewhere. They are darn clumsy to move by hand in an emergency. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of kev...@coho.net Sent: Sunday, April 30, 2017 1:40 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] NVIS HF vs VHF line-of-sight & CB I lose my antennas about once each year to straight line winds. Flying branches knock them down. But if the wires are still intact I can run the nets with the lowered antennas. Using less than optimal antennas works; just not as well as perfect antennas. In an emergency I really don't care about perfect performance, I simply want to contact someone for assistance. By all means put up the best antenna you can just remember any antenna can make contacts. Years ago I wrote some software to display antenna propagation patterns as a half wave dipole was lowered from 1 wavelength above ground until it was on the ground. The results were pretty interesting. By using the program I found many heights would work well depending on where I wanted to contact. At less than 1/10 wavelength above the ground the radiation patterns got rather odd but still worked for in-state comms. Once I had modeled what was going to happen I tested it by dropping my antennas to different heights and tested comms. Theory and practice correlated quite nicely. Kevin. KD5ONS P. S. The application also modeled 1/4 wave verticals and loop antennas. I never found the time to model the Yagi-Uda, the math got too hairy. Using Euler's equation a few times got me through the three antenna types I was able to model. Beating on the Bessel functions would have taken longer than the time I had allotted to me. K. On 4/30/2017 1:22 PM, Bill Frantz wrote: > I have always wondered how towers hold up during earthquakes. Being > able to work with ad-hoc antennas seems a good attribute for any > emergency plan. > > 73 Bill AE6JV > > On 4/30/17 at 11:34 AM, kev...@coho.net wrote: > >> Please try NVIS on 40 or 80 meters. You'll find you can cover most of >> the state with its use. Plus the antennas can be ad hoc - tossed >> into trees or even an old fence line. > --- > Bill Frantz| I don't have high-speed | Periwinkle > (408)356-8506 | internet. I have DSL.| 16345 Englewood Ave > www.pwpconsult.com | | Los Gatos, CA 95032 > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > kev...@coho.net > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 hand key input question
I'm not being funny, but did you check the obvious: is your external keyer powered? If battery, did it jiggle out of place. If mains, are both the power supply and the connection to the keyer plugged in and turned on? Back in the old days, many a TV repairman was called out to a house for an emergency fix on the TV before Howdy Doody or I Love Lucy came on only to find that the mains plug had gotten pulled out of the wall socket. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike Broga Sent: Saturday, April 29, 2017 11:44 AM To: elecraft Subject: [Elecraft] K3 hand key input question I recently rearranged the shack and now my external keyer will not key the K3. The internal keyer works just fine. I have checked the connections and they are correct. I do have VOX on also. I must be missing something basic. Any ideas? Mike, W9QS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 P3 and KAT500
I agree. I live probably 100 miles north of Harry, near Newport on the Oregon Coast. I have participated in a number of simulated emergency tests (SETs) anticipating the eventual Cascadia event with big earthquake and tsunami. First, I anticipate that everyone would be living in an RV/Trailer or out of a car because not many homes (or other structures) will survive a 9+ earthquake without serious damage, if they are left standing at all. So my SET operations are based on the assumption that energy will be precious. I have yet to run more than 100 watts into an end-fed wire strung between two trees. Often I ran only 20 watts with my K2. I have always been able to work over ranges of 50 to 1,000 miles using the best band for the time of day and sun cdx, especially if I revert to a digital mode. IMX voice traffic is tedious, slow and inefficient compared to just about any digital messaging system from CW to any of the more exotic modes now popular. I can sit at a table with various various incident commanders or team leaders using my keyboard to send traffic without interrupting their conversations. The one "frill" I like is a battery powered printer so that incoming traffic can be printed and handed over to the others there immediately. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Walter Underwood Sent: Thursday, April 27, 2017 1:09 PM To: Elecraft List Subject: Re: [Elecraft] K3 P3 and KAT500 I’m curious about running a 500 W amp on emergency power. Expectations for a severe Cascadia earthquake include power outages for at least six months. Batteries and gasoline generators won’t last that long. That is a lot of amp to run off of solar. It needs roughly 1000 VA when transmitting. I would focus on easy to erect antennas with some gain. For your 10 meter net, a Moxon beam would give 3 to 4 dB gain, about half the the 7 dB gain from a 100 to 500 W increase. And it helps on receive, too, unlike an amp. Even with a mast or tower, it would be much, much cheaper than a KPA500. http://www.innovantennas.com/our-antennas/view/productdetails/virtuemart_product_id/455/virtuemart_category_id/4.html <http://www.innovantennas.com/our-antennas/view/productdetails/virtuemart_product_id/455/virtuemart_category_id/4.html> http://www.wb5cxc.com/10mmoxon.html <http://www.wb5cxc.com/10mmoxon.html> I expect your local emcomm organizations already have frequency plans. From QRZ, it looks like you are in a valley, so you might plan for NVIS antennas. These are usually easy to put up, because they are low wire antennas. Another option would be a directional wire antenna. For example, if you are primarily communicating with Roseburg, then a 40m wire beam or “ZL special” phased beam might work well. One bright spot about widespread power outages—you won’t have much RFI! That could allow working with much lower power than usual. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Apr 27, 2017, at 10:42 AM, Matt Zilmer wrote: > > BND MAP may be set to OFF for 10m on his K3. See p54 of the Owner's Manual. > > 73, > > matt W6NIA > > > On 4/27/2017 9:49 AM, Harry Yingst via Elecraft wrote: >> 28.400 is within the 10 meter band and your K3 should work just fine >> there (Mine does) That being said 28.4 may not be your best choice as >> it tends to be a calling frequency of sorts and even though they may >> not hear you you may hear them >> >> From: KG7FYI >> To: elecraft@mailman.qth.net >> Sent: Thursday, April 27, 2017 12:31 PM >> Subject: Re: [Elecraft] K3 P3 and KAT500 >>Thanks for all the input. >> I hope you aren't getting the impression that I am preparing to be a >> loose cannon. We regularly carry on sets in anticipation of the type >> of emergencies the State is preparing for. Nonetheless my desire is >> to have as many options as possible available for our small >> community. We have been submitting grant proposals to upgrade our 2M >> equipment to be better integrated into the ARES net system here. On >> the other hand our ARES usually also does check ins on 28.400 MHZ >> which is not open on my K3. Not reasonable at all, hence my hope to >> scale things up. Our ARES group has done ARES/RACES certification to >> qualify for participation. I'll touch in with our club to see where >> we are regarding our RACES commitment. In the mean time also I'll make >> contact on my own. Thanks. >> >> >> >>__ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:
Re: [Elecraft] K3 P3 and KAT500
I routinely use the delete key for such outbursts and try to avoid judging someone by their worst comment. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of KG7FYI Sent: Thursday, April 27, 2017 3:58 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 P3 and KAT500 Thanks Joe. I am learning but the entitlement attitude is a new one for me. I'll have to figure that one out. On 04/27/2017 11:18 AM, Joe Subich, W4TV-4 [via Elecraft] wrote: > > On 4/27/2017 12:18 PM, KG7FYI wrote: > > On the other hand our ARES usually also does check ins on 28.400 MHZ > > which is not open on my K3. > > You obviously do not know how to operate your K3 (probably a failure > to red the manual) since 28.400 MHz is squarely within the amateur > 10 meter band and works just fine with a stock K3, K3S - even the K2, > KX2 and KX3. > > Again, I certainly hope you learn more about amateur radio and get > rid of the entitlement attitude. > > 73, > > ... Joe, W4TV > > > On 4/27/2017 12:18 PM, KG7FYI wrote: > > > Thanks for all the input. > > I hope you aren't getting the impression that I am preparing to be a > loose > > cannon. We regularly carry on sets in anticipation of the type of > > emergencies the State is preparing for. Nonetheless my desire is to > have as > > many options as possible available for our small community. We have > been > > submitting grant proposals to upgrade our 2M equipment to be better > > integrated into the ARES net system here. On the other hand our ARES > usually > > also does check ins on 28.400 MHZ which is not open on my K3. Not > reasonable > > at all, hence my hope to scale things up. Our ARES group has done > ARES/RACES > > certification to qualify for participation. I'll touch in with our > club to > > see where we are regarding our RACES commitment. In the mean time > also I'll > > make contact on my own. Thanks. > > > > > > > > - > > Stan KG7FYI > > -- > > View this message in context: > http://elecraft.365791.n2.nabble.com/K3-P3-and-KAT500-tp7629969p7630032.html > > Sent from the Elecraft mailing list archive at Nabble.com. > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[hidden email] > > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [hidden email] > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > > > > > If you reply to this email, your message will be added to the > discussion below: > http://elecraft.365791.n2.nabble.com/K3-P3-and-KAT500-tp7629969p7630041.html > > To unsubscribe from K3 P3 and KAT500, click here > <http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=unsubsc ribe_by_code&node=7629969&code=c3RhbmxleUBzdXJjcC5vcmd8NzYyOTk2OXwxNzg3MzA0N jYz>. > NAML > <http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=macro_v iewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.Basi cNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template .NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_ emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> > - Stan KG7FYI -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-P3-and-KAT500-tp7629969p7630053.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA1500 additional info
Unfortunately, a power limit is much like a speed limit on the highway; I'm good unless I get caught. Ever since I've been a Ham there are others like that. In the west in the 1950s we called them "California Kilowatts" who would brag about putting out 5 or 10 kW or more on the Ham bands. Once in a while the FCC would catch up with one. It was always good entertainment to read about it. For the rest of us, we learned that complaining "Why are you picking on me? Other kids did the same thing!" was not an excuse when we were small children. But not everyone learned the lesson. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob Nielsen Sent: Sunday, April 23, 2017 5:12 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 additional info What a novel thought. On 4/23/17 1:52 PM, Rick Bates (WA6NHC) wrote: > The KPA500, my only amp, will happily run up to the device limits (~600 watts) on all HF bands (500 watts on 6 M). > > This includes 60 M and 30 M where US hams are power limited by the rules (to 100 watts ERP relative to a half wave dipole on 60; and 200 watts for 30). > > It is of course, up to the operator to manage the station within the appropriate rules. > > Rick WA6NHC > > Tiny iPhone keypad & spiel Czech happens > >> On Apr 23, 2017, at 1:42 PM, Nr4c wrote: >> >> Do any amps take into account for power limit on 30 m or 60 as well? >> >> Sent from my iPhone >> ...nr4c. bill > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > n...@n7xy.net > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Signing your posts, KPA1500, KPA500
I have never complained about those who don't add a signature as long as it is clear they are a Ham, but I choose to add my own sig as a courtesy just as it is on "snail mail" that normally has the sender's name and address in the header but also bears a close and signature at the bottom. Perhaps we're just dinosaurs in today's "streamlined" world. If so, please bear with us. It takes less time for me to type the sig than it does to remove the extraneous footings added to the messages in keeping with Eric's wishes, so I don't even bother with storing one in Outlook. 73 Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Sunday, April 23, 2017 11:49 AM To: Harry Yingst; elecraft@mailman.qth.net Subject: Re: [Elecraft] Signing your posts, KPA1500, KPA500 Not too many reading posts on this reflector who do not know what a callsign is. It is part of reflector courtesy IMHO. I do not include my callsign on non ham reflector posts, nor do I sign with '73'. In other words, I do not have a signature file that attaches automatically - easy enough to do it manually. In my opinion relying on the email address for identification is not sufficient - so many email addresses are cryptic and convey little information. I am proud of my call, and have had it since I moved to Maryland in 1969 when I had to change it from W8DLB. 73, Don W3FPR On 4/23/2017 2:32 PM, Harry Yingst via Elecraft wrote: > > > It makes little sense to make a signature with a call sign when most > people outside of amateur radio would have no idea what it is? > > There is no need for a signature when the name is already in the sent field. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Experiences using a portable HF loop
The very BEST magnetic loops are incredibly inefficient, yet like any "incredibly inefficient" antenna one can make amazing contacts on them when conditions are right. The problem is with resistive losses. The day we have room-temperature superconductors, we will have efficient small transmitting loops. Until then, only a few percent of the power applied is radiated. For now, they are great when simplicity of setup allows operation where otherwise nothing could be done. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Hystad Sent: Friday, April 21, 2017 7:45 PM To: Eddy Avila Cc: Elecraft Subject: Re: [Elecraft] Experiences using a portable HF loop The May 2017 QST not only does a review of the Elecraft KX2 but it reviews the Alpha Antenna, 10-40 meter support. This is a magnetic loop antenna and I think it retails (basic model) for $299. 73, phil, K7PEH > On Apr 21, 2017, at 6:24 PM, Eddy Avila wrote: > > Greetings all, I'm curious to hear from anyone using a portable HF magnetic loop. I've read the theory behind them so I'd like to hear your opinion about them? How efficient these antennas are, especially running qRP. > > > Thanks all, > > > 73 > > > ed > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > phys...@mac.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Another really good reason to come to the Visailia DX convention this weekend...
Eric, you are better at that than White House spokesperson Mr. Spicer! 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Eric Swartz - WA6HHQ, Elecraft Sent: Thursday, April 20, 2017 3:08 PM To: KV5J; elecraft@mailman.qth.net Subject: Re: [Elecraft] Another really good reason to come to the Visailia DX convention this weekend... The posting below is a little inaccurate. If we are going to announce something like everyone is talking about, we are not yet taking orders. That said, we can put people on a notification list for when we will have additional info and for when we will be taking orders for whatever we are talking about. 73, Eric /elecraft.com/ On 4/20/2017 2:54 PM, KV5J via Elecraft wrote: > I just called and pre-ordered one. I'm 3rd. on the list! Better hurry. > > > > -- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Another really good reason to come to the Visailia DX convention this weekend...
I was lucky when I put in my 240v for my kenwood 922 a couple of years ago, a very good friend is a licensed electrician, would not let me pay him very much, it always pays to be nice to everyone you know Today is a good day to have a Great Day! 73 Ron Wilcox KF7ZN On Thu, Apr 20, 2017 at 2:42 PM, Clay Autery wrote: > A 120VAC/20A circuit is appropriate for a lot of things a 1500W HF > amp is not one of them. > > Just do the 240 circuit... > > http://montac.com/images/shack_power/outlets.jpg > https://www.dropbox.com/s/67hjpy126yr48sg/2016-08-28%2009.51.14.jpg?dl=0 > https://www.dropbox.com/s/16iflr76lvwe88c/2016-08-28%2018.19.38.jpg?dl=0 > https://www.dropbox.com/s/bkz0k60nzzsg1y0/2016-07-28%2018.29.45.jpg?dl=0 > https://www.dropbox.com/s/92jeckuevh9t8j2/2016-07-27%2015.28.52.jpg?dl=0 > > Twisted pairs, steel conduit from service to sub, sub, to outlets, > 240VAC/60A sub-panel, 8 x 120VAC/20A, 2 x 240VAC/15, 2 x 220VAC/20A > > Just find an electrician who will inspect/sign off on the work. > > __ > Clay Autery, KY5G > > On 4/20/2017 3:14 PM, Dauer, Edward wrote: > > It might, but at typical efficiencies 1500W peak output would be a > significant draw on the existing 117 VAC wiring – likely over 20 amps. > With the K3/KPA500 as it is I get a just perceptible flicker in the room > lights when keying. With a dedicated 240 volt line I could also add a > cooler for the drinks. > > > > > > > > Ted, KN1CBR > > > > > > On 4/20/17, 1:53 PM, "Jeff" wrote: > > > > Not so fast on the 240 VAC line Ted. The single transistor SPE 1.3K > will do > > 1500 watts on 110v. It will be interesting to see if the Elecraft > 1500w AMP > > turns out to be a single transistor design... > > > > 73 Jeff kb2m > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rgloga...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Sub Receiver & KBPF3
I have a medical background, this was my first kit of any kind to do with electronics. While I did not find it easy, I had no problems putting it together. However it was not intuitive for me and had to study (not just read) the instructions very carefully, and usually more than once or twice. Today is a good day to have a Great Day! 73 Ron Wilcox KF7ZN On Wed, Apr 19, 2017 at 7:30 AM, Nr4c wrote: > Really? I have been quite please at the mechanical design of my Elecraft > gear. > > Yes, the sub-Rec is a bit tricky to align but with a bit of care and I > remove the side panel (with handle) for better view. > > Sent from my iPhone > ...nr4c. bill > > > On Apr 18, 2017, at 11:58 PM, Christopher Hoover > wrote: > > >> > >> The TMP cables were in the way and sub-receiver box was a bit difficult > >> getting the SUBIN and SUBOUT boards to align and mate properly. > > > > > > I installed mine myself too.(And I just r/r recently with the > addition > > of the gen coverage bp filters on the main board.) It is certainly > > fiddly. The mechanical design leaves much to be desired. > > > > 73, Christopher AI6KG. > > > >> On Sun, Apr 16, 2017 at 4:27 AM, wa9fvp wrote: > >> > >> I just installed the Sub receiver and the KBPF3A in my K3S. I have one > >> complaint and one concern. > >> > >> First the activation of the KBPF3A is very vague. It's mentioned in the > >> users manual on page 60 (the configuration menu) but there's nothing > that > >> says, while in (CONFIG:KBFP3) that you have to press [SUB] and then > select > >> "nor". I double checked the installation manual for the sub receiver > and > >> the KBFP3A but there was nothing about activating the General Coverage > >> filters. > >> > >> My concern is; I consider myself as an experienced kit builder but for > me, > >> it was a bit difficult installing the Sub-Receiver. The TMP cables > were in > >> the way and sub-receiver box was a bit difficult getting the SUBIN and > >> SUBOUT boards to align and mate properly. Someone who is new to kit > >> building would have a more difficult time. > >> > >> The sub-receiver is working great and the one thing I like about it is; > >> it's > >> a clone of the main receiver with FM, AM, 2.8, 400 and 250Hz filters. I > >> wonder how the sub-receiver would stack-up on Sherwood Engineering's > test > >> data. > >> > >> Jack WA9FVP > >> Willco Electronics > >> > >> > >> > >> - > >> Jack WA9FVP > >> > >> Sent from my home-brew I5 Core PC > >> -- > >> View this message in context: http://elecraft.365791.n2. > >> nabble.com/Sub-Receiver-KBPF3-tp7629327.html > >> Sent from the Elecraft mailing list archive at Nabble.com. > >> __ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > >> Message delivered to c...@murgatroid.com > >> > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to n...@widomaker.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rgloga...@gmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] A little theory
Aaargh. Here's the link: http://www.gocomics.com/alley-oop/2003/08/04 Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] A little theory
I forgot to add, if you have any comments, let us take them off the Elecraft list. The OT Traffic here has been FIERCE lately, Hi! 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau Claire Sent: Tuesday, April 18, 2017 7:43 PM To: kev...@coho.net; elecraft@mailman.qth.net; 'QRP-L Mailing List' Subject: Re: [Elecraft] A little theory For all of you Feynman fans out there, you might get a chuckle out of these Alley Oop strips featuring Dick hisself from 2003. Arrow forward a couple of days an Dr. Feynman will enter center stage, complete with Bongos. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of kev...@coho.net Sent: Sunday, April 16, 2017 11:41 AM To: elecraft@mailman.qth.net; QRP-L Mailing List Subject: [Elecraft] A little theory If you are not familiar with Richard Feynman he was a physicist who worked on the Manhattan Project. He was also a professor at Caltech. Here are some of his lectures on physics which he offered to undergrads. Introductory college level physics taught by a master. http://www.feynmanlectures.caltech.edu/ 73 & GL, Kevin. KD5ONS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@cobi.biz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] A little theory
For all of you Feynman fans out there, you might get a chuckle out of these Alley Oop strips featuring Dick hisself from 2003. Arrow forward a couple of days an Dr. Feynman will enter center stage, complete with Bongos. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of kev...@coho.net Sent: Sunday, April 16, 2017 11:41 AM To: elecraft@mailman.qth.net; QRP-L Mailing List Subject: [Elecraft] A little theory If you are not familiar with Richard Feynman he was a physicist who worked on the Manhattan Project. He was also a professor at Caltech. Here are some of his lectures on physics which he offered to undergrads. Introductory college level physics taught by a master. http://www.feynmanlectures.caltech.edu/ 73 & GL, Kevin. KD5ONS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] A little theory
Having read Feynman's books, I got a big chuckle out of hearing him lecture for the first time. With his strong New York accent, he reminded me of the guy who makes great sandwiches at the local deli. And his sense of humor was such that he'd probably get a big laugh out of that comparison. Here's 5 minutes of clips of a very passionate Feynman lecturing on Algebra! http://www.feynman.com/2016/05/19/the-animated-feynman-lectures/ His dedication to teaching at all levels makes him a genuine hero in my book. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob Nielsen Sent: Sunday, April 16, 2017 2:42 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] A little theory I did meet him. The first thing he said to me was, "Call me Dick", as he wasn't much for titles. When he was scheduled to give a lecture to the freshman class at Caltech we were told to arrive early because the upper-classmen would fill up the lecture hall. In addition to his work in theoretical physics, he was a master of the bongo drums. A somewhat-fictionalized film of Feynman's time at Los Alamos is "Infinity" starring Matthew Broderick. 73, Bob N7XY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] A little theory
I'll attest that it is great and interesting reading for anyone interested in Physics. I bought the three-volume set in San Francisco back in the 1980's, and it remains a valued part of my scientific library alongside Pauling's text on Inorganic Chemistry. Feynman also wrote an eloquent text on quantum electrodynamics for those with little scientific background called "QED The Strange Theory of Light and Matter". And for some thoughtful insights into Feynman himself there is his book "The Meaning of it All - Thoughts of a Citizen-Scientist" or for a few chuckles his autobiographical book "What do YOU Care What Other People Think?" I strive to live by his advice, "Study hard what interests you the most in the most undisciplined, irreverent and original manner possible." I'm afraid not all of my college instructors agreed, however. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of kev...@coho.net Sent: Sunday, April 16, 2017 11:41 AM To: elecraft@mailman.qth.net; QRP-L Mailing List Subject: [Elecraft] A little theory If you are not familiar with Richard Feynman he was a physicist who worked on the Manhattan Project. He was also a professor at Caltech. Here are some of his lectures on physics which he offered to undergrads. Introductory college level physics taught by a master. http://www.feynmanlectures.caltech.edu/ 73 & GL, Kevin. KD5ONS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
As Phil knows, it is commonly used on ships in the US Navy for the same reason. Many US Navy ships have an on-board cellular system but it's useless without a way to get RF into all the compartments and passageways through steel plate! 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Kane Sent: Saturday, April 15, 2017 3:25 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 mobile? On 4/15/2017 7:43 AM, Phil Hystad wrote: > Unfortunately, I can’t remember anything of the details of how this > was done but I suspect wide-band amplifiers and wires and top-side > wide-band antennas. Leaky coax (trade name == Radiax). It's many-decades-old technology. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Heathkit Tool.
Yep, I have one too. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of wa9fvp Sent: Saturday, April 15, 2017 1:38 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Heathkit Tool. Years ago I built a Heathkit SB101 and other smaller projects. Normally they would include a very a handy tool. It's a plastic, what I call, a "nut holding" tool. Keeping it all these years I found it to be very handy while assembling my KPA500, KAT500 and K3S. <http://elecraft.365791.n2.nabble.com/file/n7629328/DSC00410.jpg> - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http://elecraft.365791.n2.nabble.com/Heathkit-Tool-tp7629328.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Sub Receiver & KBPF3
Hi Jack: Page 16 of the KBPF3A manual says under the heading "Enable the KBPF3A Module": "Enable the KBPF3A for either the main or sub receiver using the CONFIG menu as described in the Owner's Manual. The KBPF3A will not operate until this is done!" Perhaps I should have repeated the whole procedure in the KPBP3A manual. I think you will get a LOT of agreement that installing the KRX3 module is one of the most complex bits of assembly of the K3S. We've made many "tweaks" to the procedure in the attempt to make it easier, but it is still not simple. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of wa9fvp Sent: Saturday, April 15, 2017 1:27 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Sub Receiver & KBPF3 I just installed the Sub receiver and the KBPF3A in my K3S. I have one complaint and one concern. First the activation of the KBPF3A is very vague. It's mentioned in the users manual on page 60 (the configuration menu) but there's nothing that says, while in (CONFIG:KBFP3) that you have to press [SUB] and then select "nor". I double checked the installation manual for the sub receiver and the KBFP3A but there was nothing about activating the General Coverage filters. My concern is; I consider myself as an experienced kit builder but for me, it was a bit difficult installing the Sub-Receiver. The TMP cables were in the way and sub-receiver box was a bit difficult getting the SUBIN and SUBOUT boards to align and mate properly. Someone who is new to kit building would have a more difficult time. The sub-receiver is working great and the one thing I like about it is; it's a clone of the main receiver with FM, AM, 2.8, 400 and 250Hz filters. I wonder how the sub-receiver would stack-up on Sherwood Engineering's test data. Jack WA9FVP Willco Electronics - Jack WA9FVP Sent from my home-brew I5 Core PC -- View this message in context: http://elecraft.365791.n2.nabble.com/Sub-Receiver-KBPF3-tp7629327.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 mobile?
One issue with mobile QRO is the antenna. While a mobile whip/loading coil combo can be designed for high power, it becomes difficult to prevent corona discharge from the end of the whip while transmitting at high power. One fairly common solution decades ago was to mount a copper toilet tank float on the end of the antenna. Of course the wind resistance then required guying the whip. Since it was typically on the rear of the car, a nylon cord from the mid-point to somewhere forward on the roof was common. Another approach - back when car bodies were steel - was to extend the whip to it could be bent over and tied to the front bumper, turning the car body and whip into a small loop antenna. Today, it might be hard to establish the necessary distance from the antenna while sitting in the car to meet modern RF exposure limits, especially on 20 meters and up. I never went QRO in my car, but had buddies who tinkered with it way back when vacuum tubes were "king". Back then I lived in the land of the "California Kilowatt" (Southern Calif.). They mounted outboard generators on their car engines to handle the power demand. Adding filaments, etc., a kW mobile station might require 1.5 or 2 kW of d.c. power to run it. Got a chuckle out of them when they'd key the mic to transmit while sitting at a stop light with the engine at idle, and the sudden added power demand caused the engine to stall. 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Help me choose my first HF rig
I agree. Get a rig and get on the air. In some ways it's sad that Ham rigs have become so sophisticated and cost enough that most Hams need to think in terms of resale value. There is a Ham I used to chew the rig with on 40 CW regularly who saved from his small fixed income for a years to replace his HW-8 with a new 100 watt rig. Dang! He was happy with the new rig. Then I worked him again a few weeks later and he was back on the HW-8. I asked him why. It seems he knew a Ham nearby who was on also a small income and lived alone. His rig died and the cost to repair was prohibitive. Rather than leave him off the air my friend made him a gift of his new rig and dusted off his old HW-8 again. I also had a HW-8 for which I had built an outboard 25-watt amplifier (the HW-8 ran about 2 watts barefoot). I had since built a K2 running 10 watts, so I sent him my outboard amp for the HW-8. That's the Ham Radio I was raised with. We often swapped stories about how when we had a need others had given us stuff over the years or passed it on very cheaply. It's an aspect of the hobby I try hard to see continue. 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3S SSB TX monitor - feature request
With respect, it's all what you have grown accustomed to. The AM and FM stations where I worked only had a speaker in the booth over which the DJ heard audio from the disk on the turntable or rare network feed. He/she never heard their own voice. Same was true in aircraft and military radio comms. And I doubt if many Hams today carrying an HT are disturbed by not hearing their own voices. Sidetone in telephones was used to keep the person speaking from shouting (as they did in early phones). The higher the sidetone volume, the quieter the person would speak. We used that to great effect to tame a "shouter" in bull-pen office environments. Unfortunately mobile (cellular) phones offer no such benefit. My point is that I suspect that you are tapping into a change in recording, broadcast and DJ work that is beginning to impact Ham operations. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Luis V. Romero Sent: Saturday, April 8, 2017 10:04 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S SSB TX monitor - feature request All: As a broadcast professional, I completely agree with the need to hear one's voice as side tone in your headset while speaking. Not hearing this does make one feel deaf. This is a common feature in professional intercom systems as well as music performance monitoring for singers and instrumentalists and even your telephone! It's not really a "nice to have": In my opinion, it's a "must have". __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Was Amplifier - Now RF exposure limits
Setting exposure limits to anything potentially harmful is a legal and medical minefield. The best I ever hope for is guidance, not limits. As George notes, some people have suffered significant harm from RF fields. Others, not at all. Remember, the microwave oven was "invented" by an engineer working around magnetron RF sources and discovered the "Hershey" chocolate bar in his shirt pocket had melted. When he figured out why, the "Radar Range" (first brand of microwave oven) was born. One cold night in the late 1950's, working outside on a flight line of F-86D fighters lined up wingtip to wingtip for preflight repairs and testing, I concluded I must be catching the flu. I felt weak hot and sweaty after several minutes talking with someone. We were standing in front of the planes, most of which had the nose radomes removed for testing the fire-control radar systems. Looking up, I noticed the radar antenna of one plane across the way with someone sitting in the cockpit was pointing directly at me. On a hunch, I took a few steps to one side and the antenna twitched to follow me. I immediately moved completely out of the way and within a short time I felt quite normal. Relating the experience to other people working the flight line, I learned it was a common occurance. The concept of being "cooked" by RF radiation was new and no one thought much of it. I don't think I, nor did I hear of anyone else, being injured by the experience, although I was thereafter careful not to stand in front of a transmitting radar antenna again. Not that Lockheed wasn't paying attention. We used to gather around the tailpipes on break after an engine run, occasionally roasting a hot dog or sausage on a stick held up just inside the afterburner which often still glowed red, and they quickly forbade that practice for safety reasons. But non-ionizing electromagnetic radiation was not on anyone's "radar" so to speak back then. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gmail - George Sent: Friday, April 7, 2017 12:55 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Was Amplifier - Now RF exposure limits Ed & Brian, My father had severe health consequences from working in a classroom with operating military radars! Since the adoption of OET 65 in the late 90s, all licensees (including Hams) have had the responsibility to insure their station is in complete compliance with RF exposure limit guidelines. Most likely during your last license renewal or application for a new license, you checked a box stating you would insure compliance with non-ionization radiation limits. Those guidelines are contained in bulletin OET 65. For Hams OET 65 Supplement B (https://transition.fcc.gov/bureaus/oet/info/documents/bulletins/oet65/oet65 b.pdf) gives us some shortcuts to insure compliance without the tedious calculations. Many of the tables were provided by ARRL & the W5YI Group. There are also calculators available on the internet to make it quite easy. Googleing "amateur radio oet 65 calculator" returned many to choose from. The only caveat I will give is that most of the shortcuts and calculators are for a single transmitting antenna at a specific location. Multiple radiating antenna WILL change the protection distances - Field Day & group contesting come to mind! Use to be we had to submit OET 65 compliance statements when licensing all transmitters for Broadcast Stations ranging from 150 MHz to 23 GHz. I believe we finally could use just a blanket cover statement ; but it has been a while since I licensed a non-Ham transmitter. You do need to insure you are in compliance - to protect your family, friends, neighbors and yourself. 73 George AI4VZ From: brian "Considered dangerous" isn't quite right. The jury is out of the exact danger levels of RF for all the various frequencies. These distances are more of an accepted limit that protects you from inquiries regarding RF exposure. Pointing to the distances being met helps get you off the hook. People will be surprised to see how small the distances these calculations are-- especially at lower frequencies. One note often overlooked. The distance is defined as the distance from feedpoint (usually center) of the antenna. Also the duty cycle can be considered in the calculation. There are stock duty cycles for SSB and CW given in the documentation. Antenna gain may have to be included. It used to be that anything at 100 watts and below at HF was exempted. I believe that has changed. 73 de Brian/K3KO On 4/7/2017 16:06 PM, Edward R Cole wrote: > In the USAmerica ham's now have the *responsibility* of determining > the safe operating zones for each antenna per FCC regulation. I doubt > many ever do the calculation. Fortunately Australian ham Doug > MacArthur (sk)
[Elecraft] Variable Scan Rate
Haven't seen any comments on K3 frequency scanning -- maybe most folks don't use it. But it would sure be handy if we could change the scan rate by rotating the VFO-B control when in scan mode. Tnx Ron KB6K __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX2 Matching Power Amplifier
Sure, every little bit might help but, IMX, power is a matter of parity. For example, if everyone ran 5 W maximum you'd be able to work almost all the stations you hear with the KX2 "barefoot". For us QRP enthusiasts the challenge is spotting good signals from OTHER QRP stations that tells us we are likely to be heard by them. The fun is in noting that they don't need to be locals. Sometimes signals are good at QRP levels with DX too. Therein lies the value of the QRP "watering holes" around the bands. Elsewhere on the bands, I look for solid *strong* signals to call when I'm QRP, especially with a compromise antenna. As for going QRO, I agree with Mike; I don't get very excited about anything less than a 10 dB increase. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bert Garcia N8NN Sent: Thursday, April 6, 2017 12:43 PM To: 'Mike Morrow'; elecraft@mailman.qth.net Subject: Re: [Elecraft] KX2 Matching Power Amplifier The KX2 is recommended to operate at 5 watts and below for digital modes. When operating QRP, you are often at the noise level on the receiving end, especially with compromise antennas. Any improvement, even 5 dB, will make the difference between being heard or not. My primary design goal for a KXPA35 is low cost, thus I suggest a modest power level, no SWR/wattmeter, a manual bandswitch, and any other cost savings that can be had. Those wanting a full gallon of 100 watts with all the cool features Elecraft has to offer can opt for the KXPA100, a truly fine amplifier in all respects. Rather than a fancy pair of shoes, I'm just looking for a pair of flip-flops. Bert N8NN -Original Message- From: Mike Morrow [mailto:k...@earthlink.net] Sent: Thursday, April 6, 2017 12:33 PM To: n...@earthlink.net; elecraft@mailman.qth.net Subject: Re: [Elecraft] KX2 Matching Power Amplifier > I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a > matching RF amplifier with about 35 watts output with 5 watts in. Since the KX2 runs 10 watts out, more or less, you're asking for external gear to run only 5 dB better. I wouldn't consider something like that for even a moment. The existing 100 watt amp is likely the minimum increment that would be almost worth the trouble. A subsequent post about using a T1 ATU on the output of a 40 watt external amp seems ill-advised, especially for such minimal practical benefit. I'd prefer to see an enhanced KX3HP (not KX2) with KXAT3HP capable (only with stout 14 vdc external power) of the 35 watts you seek. It would sell as a unified package that is the buyer's only choice, but not as multiple components. Still ... the benefit for the effort would not be there. Mike / KK5F __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX2 Matching Power Amplifier
Well glad it is going to work for you. I bought it and the tuner for mobile work. I did not want to spend a fortune as my mobile time is fairly random, but found that my wonderful KX2 was just not being heard from the car when I tried to put out counties or make contacts. I could hear a lot but was not being heard. Good luck. Today is a good day to have a Great Day! 73 Ron Wilcox KF7ZN On Thu, Apr 6, 2017 at 10:54 AM, Bert Garcia N8NN wrote: > Ron – Found it! Very impressive amplifier for my KX2. Guess I’ll build > one while waiting for the Elecraft KXPA35 (or maybe the KXPA50…?). The > Hardrock 50 has a lot more features than I was looking for, but they are > all useful. Thanks for the help. Again, very impressive! > > > > Bert N8NN > > > > *From:* Ron Wilcox [mailto:rgloga...@gmail.com] > *Sent:* Thursday, April 6, 2017 11:04 AM > *To:* n...@earthlink.net; Elecraft@mailman.qth.net > *Subject:* Re: [Elecraft] KX2 Matching Power Amplifier > > > > sorry, it is hobby pc that makes the amplifier, here is their website, and > it is the hardrock 50., https://www.hobbypcb.com/ > > > Today is a good day to have a Great Day! > > 73 Ron Wilcox KF7ZN > > > > On Thu, Apr 6, 2017 at 8:53 AM, Bert Garcia N8NN > wrote: > > Ron – I couldn’t find the amplifier on the QRP Guys website. Do you have > a link? I bought their iambic paddle recently. > > > > Bert N8NN > > > > *From:* Ron Wilcox [mailto:rgloga...@gmail.com] > *Sent:* Thursday, April 6, 2017 10:29 AM > *To:* Irma & Linas(LY2H) > *Cc:* elecraft@mailman.qth.net; n...@earthlink.net > *Subject:* Re: [Elecraft] KX2 Matching Power Amplifier > > > > qrp guys also makes a nice 50 watt amplifier that works great with the > KX2, has the cable for it, comes as kit for the fun of putting it together, > quality product as well > > > Today is a good day to have a Great Day! > > 73 Ron Wilcox KF7ZN > > > > On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) > wrote: > > Nice idea! Before Elecraft steps-in to this PA market, I am using with > great success and pleasure the Chinese MiNiPa50,:) > AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the > 80-20m bands and around 40W on higher bands. 6,6A current consumption at > 13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1, > yes, it can stand up to 40 W , just do not tune at this power level, :)) At > the price of approx 150 USD it is very good value for money, I think. > > 73 de Linas LY2H > > On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN wrote: > > > I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a > > matching RF amplifier with about 35 watts output with 5 watts in. > Include > > an antenna tuner. Same size and shape and style as the KX2. Leave out > the > > SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will > > save money. 80-10 meters only. Call it the KXPA35. > > > > Bert N8NN > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to irmalina...@gmail.com > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rgloga...@gmail.com > > > > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX2 Matching Power Amplifier
sorry, it is hobby pc that makes the amplifier, here is their website, and it is the hardrock 50., https://www.hobbypcb.com/ Today is a good day to have a Great Day! 73 Ron Wilcox KF7ZN On Thu, Apr 6, 2017 at 8:53 AM, Bert Garcia N8NN wrote: > Ron – I couldn’t find the amplifier on the QRP Guys website. Do you have > a link? I bought their iambic paddle recently. > > > > Bert N8NN > > > > *From:* Ron Wilcox [mailto:rgloga...@gmail.com] > *Sent:* Thursday, April 6, 2017 10:29 AM > *To:* Irma & Linas(LY2H) > *Cc:* elecraft@mailman.qth.net; n...@earthlink.net > *Subject:* Re: [Elecraft] KX2 Matching Power Amplifier > > > > qrp guys also makes a nice 50 watt amplifier that works great with the > KX2, has the cable for it, comes as kit for the fun of putting it together, > quality product as well > > > Today is a good day to have a Great Day! > > 73 Ron Wilcox KF7ZN > > > > On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) > wrote: > > Nice idea! Before Elecraft steps-in to this PA market, I am using with > great success and pleasure the Chinese MiNiPa50,:) > AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the > 80-20m bands and around 40W on higher bands. 6,6A current consumption at > 13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1, > yes, it can stand up to 40 W , just do not tune at this power level, :)) At > the price of approx 150 USD it is very good value for money, I think. > > 73 de Linas LY2H > > On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN wrote: > > > I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a > > matching RF amplifier with about 35 watts output with 5 watts in. > Include > > an antenna tuner. Same size and shape and style as the KX2. Leave out > the > > SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will > > save money. 80-10 meters only. Call it the KXPA35. > > > > Bert N8NN > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to irmalina...@gmail.com > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rgloga...@gmail.com > > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX2 Matching Power Amplifier
qrp guys also makes a nice 50 watt amplifier that works great with the KX2, has the cable for it, comes as kit for the fun of putting it together, quality product as well Today is a good day to have a Great Day! 73 Ron Wilcox KF7ZN On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) wrote: > Nice idea! Before Elecraft steps-in to this PA market, I am using with > great success and pleasure the Chinese MiNiPa50,:) > AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the > 80-20m bands and around 40W on higher bands. 6,6A current consumption at > 13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1, > yes, it can stand up to 40 W , just do not tune at this power level, :)) At > the price of approx 150 USD it is very good value for money, I think. > > 73 de Linas LY2H > > On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN wrote: > > > I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a > > matching RF amplifier with about 35 watts output with 5 watts in. > Include > > an antenna tuner. Same size and shape and style as the KX2. Leave out > the > > SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will > > save money. 80-10 meters only. Call it the KXPA35. > > > > Bert N8NN > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to irmalina...@gmail.com > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rgloga...@gmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Grounding question on remote tuner
While I've pulled Fred's stunt at times in the past, be aware that having two
grounds can be very dangerous. If something opened the circuit to the mains
ground at the house, you could find mains voltage (120 or 240 Vac) between the
coax connector from the shack and the tuner at the antenna when you disconnect
it for any reason.
The smart move is to run a heavy copper wire alongside the coax from a ground
point in the house to the ground at the antenna so that both are grounded
together.
I agree with Barry about the unun. I'd not use it (and don't on my Inverted L,
but I am not using an MFJ tuner either). If you have a decent "RF ground" at
the tuner you probably will not need any further isolation.
73, Ron AC7AC
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred
Jensen
Sent: Wednesday, April 5, 2017 12:31 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Grounding question on remote tuner
Assuming I understand your configuration and that when you say "isn’t the tuner
already connected to the ‘system ground’ via the coax shield?"
you mean the 3 ft of coax from the 4:1 transformer to the tuner:
The 3 ft path from the transformer ["unun"] to the tuner is handled by the
coax. The "tuner ground" would then become a safety ground ...
which is a very large, long, and tedious subject involving the NEC, UFER's,
large conductors, a lot of work, and possibly $$.
If "long coax to the shack" means the tuner is a long way from the shack and
your service entrance, I'd drive a ground rod at the tuner and connect the lug
to that. I'm probably wrong, but that's what I'd do.
73,
Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn
On 4/5/2017 11:19 AM, Randy Cook wrote:
> Weather damage repair time. I am rewiring my ~84 foot inverted L antenna
> system, Up a SpiderPole about 31 feet, out about 53 additional feet. Still
> tuning length.
> I have mounted a remote MFJ tuner on a post about 3 feet from the antenna
> base. Antenna wire goes down the pole, connects to 4:1 Unun input lug, then
> goes via coax to tuner. Out of the tuner to a long coax run to my shack.
> Choke at the rig end of the coax run.
> Radials mount on ground connection lug on the Unun.
> I was a bit confused with the tuner wiring. The manual says to connect ground
> lug to the ‘system ground’, I assume that means the radial collection point.
> But, isn’t the tuner already connected to the ‘system ground’ via the coax
> shield? Is it necessary to run another wire from the tuner ground to the
> radial connection ground?
>
> Thanks in advance for any advice.
>
> 73
> Randy - K6CRC
>
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Re: [Elecraft] K3 loss of rx signal
Good point Frank. Amphenol specs leakage for their BNC connectors at 3GHz where they claim 55 dB. By comparison they claim 90 dB at 3 GHz for their type N connectors. I've never felt the need for the additional shielding in the shack. Of course these are Amphenol specs. Any other brand may have any other level of leakage. As many have noted, the extra price of a good connector is saved many times over chasing bad cable connections later. BNC specs http://www.amphenolrf.com/connectors/bnc.html N specs: http://www.amphenolrf.com/connectors/n-type.html 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of donov...@starpower.net Sent: Monday, April 3, 2017 9:38 PM To: Elecraft Reflector Subject: Re: [Elecraft] K3 loss of rx signal BNC connectors rate high for convenience and low for performance, especially leakage performance. BNC connector leakage typicallymeasures in the range from -25 to -50 dB vs -60 to -90 dB for N connectors. Any BNC connector that does not fit snugly should replaced and discarded 73 Frank W3LPL __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 loss of rx signal
Note that BNC connectors can easily handle a kW of RF power unless there is a high SWR on the line. They are rated for 500V. 73 Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Edward R Cole Sent: Monday, April 3, 2017 6:24 PM To: Elecraft Reflector Subject: Re: [Elecraft] K3 loss of rx signal Simple - use something better than PL-259's: I mainly use N connectors for low loss/high power and BNC for low power inside the shack connections. I also have TNC and sma connectors. Most connectors need a 1/4 turn beyond finger tight for reliable connections. Sure cure for loose connectors is heat shrink over them. Not only seals from wx but also loosening due to vibration. Want to see what vibration does? Install a radio in a D8 cat without some kind of vibration damping. I did long ago, and the Motorola 100w VHF radio was a cabinet full of loose parts after 8-hours running of the cat. Wonder why military radios are full of glyptol, or completely potted in plastic? 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubus...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] SSB Net
By that assessment, sometimes 10 kW is "QRP" (can't be heard) and sometimes 100 mW is QRO (heard Q5). It's ALL about band cdx. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes Stewart Sent: Sunday, April 2, 2017 2:31 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] SSB Net And that's all you need to know about QRP. On 4/2/2017 1:37 PM, Steve Sergeant wrote > I knew I didn't have chance to be heard using QRP power. > > --Steve, KC6ZKT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KAT500 tuning behavior when the load is impossible to match ?
To answer your other question, if the KAT500 cannot find a match better than 1.5:1 the FAULT indicator on the front panel will light. You will also trigger a fault if: 1) The RF power is above 110 watts while tuning to protect the relays from arcing. 2) The impedance can be matched but is outside of the KAT500's normal tuning range with an impedance that may produce RF voltages that could damage the components considering the RF power applied. In that case, the fault occurs when you raise the RF power. However, it is safe to operate at any power level below which the fault occurs. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Sunday, April 2, 2017 2:12 PM To: Phil Hystad; Elecraft Reflector Subject: Re: [Elecraft] KAT500 tuning behavior when the load is impossible to match ? Phil, It is indeed possible to match a very high SWR or even an open circuit or a short. That will be more probable on the higher frequency bands than on the lower bands. 73, Don W3FPR On 4/2/2017 12:42 PM, Phil Hystad wrote: > I got my second KAT500 tuner to use with my new backup rig and while setting up and testing and tuning with my two different antennas I made a mistake. > > I first observed the results displayed on the utility program operate page where the tuned SWR was 1:1 and the bypass SWR was something like 54:1. I immediately realized that something was not right and discovered that my coax cable was not switched to the antenna but rather my dummy load but the cable to the dummy load was disconnected (because I was moving things around). > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Amp Thoughts: 1000 watts or 1500 watts?
Who does that on HF? I was assuming we were talking about 160-10 meters. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Charlie T, K3ICH Sent: Thursday, March 30, 2017 3:35 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Amp Thoughts: 1000 watts or 1500 watts? In some cases a dB or so CAN make a difference. Otherwise, why bother to put a ½dB noise figure GaAsFET pre-amp at the antenna just to overcome 2dB of feedline loss? At the other extreme, if you are being received at 20dB over S-9 running a kilowatt, you'll still be S-5 at 100 milliwatts. 73, Charlie k3ICH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Amp Thoughts: 1000 watts or 1500 watts?
2 dB might make a difference if you are only interested in having your call sign dug out of the noise for a contest or DXCC contact. Way back the early books from the 1930's that I read and the OT commercial operators from that era I knew said that under typical conditions found on the air, 6 dB was about the minimum change to hear a real difference in the signal while exchanging messages or other extended information. Those stations would not try a direct contact if the signals were "in the mud" opting instead for trying again at different time or getting a relay. In commercial operations we did not use the Ham RST system, but rather QSA 1 through 5. 1 was a barely detected signal in the mud. 5 was a loud signal with perfect copy. I confess to doing about the same with Ham signals, choosing between at most five levels by ear for my report without reference to an S-meter. Personally, I've never gotten very excited about anything less than a 10 dB improvement, but the only DX I work are those calling me - usually for a rag chew - and I don't contest. And, for me, Ken's observation is quite right. If I get the bug to drop my Inverted L, rub some RF grease on the wire, neaten things up in general and restring it, I do think I am getting out better and stations seem to come back more quickly. Expectations are everything! 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken K6MR Sent: Thursday, March 30, 2017 2:27 PM To: Richard Thorne; Elecraft Reflector Subject: Re: [Elecraft] Amp Thoughts: 1000 watts or 1500 watts? I'm running my two KPAs combined. Is there a difference? That's one of those questions that is tough to answer. I worked lots of people with 500W. I work lots of people with 1000+ W. I don't chase DXCC but things seem to work better on 160. I do feel louder. I think it was N6TR that said (probably mis-quoted here) "If you feel loud you are loud". Ken K6MR From: Elecraft on behalf of Richard Thorne Sent: Thursday, March 30, 2017 9:31 AM To: Elecraft Reflector Subject: [Elecraft] Amp Thoughts: 1000 watts or 1500 watts? I have a pair of KPA-500's for an SO2R setup. Seamless. I've been running the numbers on the advantage of going to 1000 or 1500 watts. 500 watts to 1000 watts - 3.01 db gain 500 watts to 1500 watts - 4.77 db gain Will the increase from 1000 to 1500 watts or a 1.76 db increase in gain, make a difference? I'm sure it would in some circumstances, but how often? I'm just starting on my quest to increase my dxcc totals on 80 and 160, so maybe that 1.76 db would be the difference between a having a qso or not having a qso. What are the thoughts of the serious low band guys? Thanks Rich - N5ZC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] New Amplifier Capabilities
And I am sure that there are many like myself who while I have not posted, have been reading all of the comments and are very interested Today is a good day to have a Great Day! 73 Ron Wilcox KF7ZN On Thu, Mar 30, 2017 at 10:22 AM, charlie carroll wrote: > Eric/Wayne: > > Quite a few folks have contributed many ideas about the characteristics of > a new 1500 watt solid state amp. With all this info, I am now curious as > to what might make the cut and when. I won't even go near the $$ question. > :-) > > 73 charlie, k1xx/vp2mmf > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rgloga...@gmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Amplifier thoughts
Idaho is a great place for our hobby. That is where I got my start in the 80's from Don KA7T. Good luck. I am excited about the chatter the last week or so about our wishes for an amp. Hope it happens. There have been some great ideas so far. Today is a good day to have a Great Day! 73 Ron Wilcox KF7ZN On Wed, Mar 29, 2017 at 4:07 PM, Rick WA6NHC wrote: > Or in my case, the use of ladder line (durned HOA infested area) to handle > the near 20:1 on 160M (better on most other bands) so that the loss is from > the tuner to the antenna, not the final. > > My solution is that I'm moving to a location better suited for antennas, > far far away in a land called Idaho. ;-) > > Rick wa6nhc > > > On 3/29/2017 11:47 AM, Ron D'Eau Claire wrote: > >> An SWR approaching 10:1 means high RF voltages on a coaxial line at the >> voltage loops and high current flows at the current loops requiring a very >> heavy-duty transmission line - likely a nitrogen-filled hard line at 1.5 kW >> or, at the very least, a very heavy Teflon insulated line. In practice, it >> is usually the voltage breakdown that kills coax. >> >> Of course high SWR also means high losses between the amp and the antenna. >> >> The power ratings published by coax cable suppliers are based on a low >> SWR -- typically less than 1.5:1. >> >> The bottom line is that going QRO means a more careful design and >> installation of the entire antenna system. >> >> 73, Ron AC7AC >> >> >> >> -Original Message- >> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of >> brian >> Sent: Tuesday, March 28, 2017 4:31 PM >> To: elecraft@mailman.qth.net >> Subject: Re: [Elecraft] Amplifier thoughts >> >> KAT500 handles a much wider SWR range (like to about 10:1). >> >> Why do you assume people are lucky enough to have antennas with no more >> than a 3:1 SWR across the ham bands? >> >> Yes, higher SWR's require beefed up components but welcome to the real >> world. >> >> 73 de Brian/K3KO >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to wa6...@gmail.com >> > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rgloga...@gmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Amplifier thoughts
Yes, and that's why the SWR measured at the transmitter is lower than the actual SWR (measured at the antenna) due to the loss in the line. My point is that the sort of SWR we might accept at lower powers quickly becomes impractical at higher powers because of the constraints imposed by the transmission line. The sort of coaxial line most Hams use, even the super low-loss big stuff, simply cannot handle the voltages produced by a high SWR. The place to do the matching is at the antenna end of the transmission line. So how about a weather proofed remote QRO ATU that goes at the antenna end of the transmission line? As others pointed out such an ATU won't be small due to the potentially huge voltages and currents involved, it won't be lightweight and it certainly won't be cheap. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown Sent: Wednesday, March 29, 2017 12:11 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Amplifier thoughts On Wed,3/29/2017 11:47 AM, Ron D'Eau Claire wrote: > An SWR approaching 10:1 means high RF voltages on a coaxial line at > the voltage loops Remember that the SWR on a transmission line, and thus the loss in the line, is determined ENTIRELY by the match between the antenna and the line, NOT between the line and the transmitter. The SWR measured at the transmitter is a measure of the difference between the impedance the transmitter WANTS to drive and the impedance of the load connected to it. If that INDICATED SWR is high, a solid state transmitter will "throttle itself back" to protect itself, but that's not LOSS. The function of an antenna tuner is to make the transmitter happy by giving it a load that it's designed for, so that it can put out its full power. For example, a long wire antenna of random length might be nowhere near 50 ohms resistive, so must be transformed to 50 ohms resistive so that the transmitter can put power into it. Likewise, an antenna perfectly matched to 75 ohm coax or 150 ohm twin lead has no excess loss in the line but needs a matching network to make the transmitter happy. My high dipoles (at 100 - 140 ft) are fed with 75 ohm coax to minimize the loss in the line. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Amplifier thoughts
An SWR approaching 10:1 means high RF voltages on a coaxial line at the voltage loops and high current flows at the current loops requiring a very heavy-duty transmission line - likely a nitrogen-filled hard line at 1.5 kW or, at the very least, a very heavy Teflon insulated line. In practice, it is usually the voltage breakdown that kills coax. Of course high SWR also means high losses between the amp and the antenna. The power ratings published by coax cable suppliers are based on a low SWR -- typically less than 1.5:1. The bottom line is that going QRO means a more careful design and installation of the entire antenna system. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of brian Sent: Tuesday, March 28, 2017 4:31 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Amplifier thoughts KAT500 handles a much wider SWR range (like to about 10:1). Why do you assume people are lucky enough to have antennas with no more than a 3:1 SWR across the ham bands? Yes, higher SWR's require beefed up components but welcome to the real world. 73 de Brian/K3KO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Reflector problems
I have not been receiving the Reflector in recent months and decided that maybe I missed something that was required to stay subscribed. I don’t remember or can’t find the password from my original subscription and therefore re-subscribed. Please help me get back on the list. Thanks Phillip R. Cowherd (Ron) K4GYD __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3S ELF 10KHz
The Jim Creek antenna facility is amazing - a series of over mile long wires (cables) for the radiator strung from mountain to mountain across a valley being fed with IIRC a megawatt of VLF RF. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike Morrow Sent: Thursday, March 23, 2017 3:04 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S ELF 10KHz I didn't understand the reference to audio either. When I on the crew of a US ballistic missile submarine more than 40 years ago, our main communications receivers were AN/BRR-3 units whose full frequency range was only 14 to 30 kHz. These received signals from coastal stations operating at megawatt output levels, but there was no one near such a station with his ear drums damaged by or even sensitive to the station's continuous output. :-) Anyone can listen to such signals as they exist today. I'm not sure what the point would be...everything down there is very deeply encrypted. Mike / KK5F -- >> Wait a second, there's a big difference between a sound pressure wave >> and an electromagnetic wave at 10-kHz... --- > Receivers THAT I AM AWARE OF begin coverage at 15 khz. Used to listen > to > 16 khz from GBR in England on an RAL when lived in Florida. > > After all, 10 khz -is- audio. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3S ELF 10KHz
Absolutely. You would need an antenna connected to an audio transducer (speaker or 'phones) to hear it. (Perhaps one would call it a non-conversion receiver.) An audio amplifier helps, but you have to deal with the 120 Hz buzz caused by the 60 Hz power line fields all around. A high pass filter with a cutoff above 150 Hz helps a great deal. Listening to the variety of squeaks, chirps and other noises produced by electronic discharges all over the planet is a fascinating hobby in itself. They are commonly referred to as 'Sferics, short for atmospherics. 73 Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of thelastdb Sent: Thursday, March 23, 2017 6:57 AM To: Ken G Kopp; wa9fvp; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S ELF 10KHz Wait a second, there's a big difference between a sound pressure wave and an electromagnetic wave at 10-kHz... Myron WVØHPrinted on Recycled Data Original message From: Ken G Kopp Date: 3/23/2017 7:41 AM (GMT-07:00) To: wa9fvp , elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S ELF 10KHz Receivers THAT I AM AWARE OF begin coverage at 15 khz. Used to listen to 16 khz from GBR in England on an RAL when lived in Florida. After all, 10 khz -is- audio. 73 K0PP On Mar 22, 2017 22:22, "wa9fvp" wrote: > Is it possible, maybe in the next firmware rev, to extend the bottom > end of the K3S down to 10KHz? > > > > - > Jack WA9FVP > > Sent from my home-brew I5 Core PC > -- > View this message in context: http://elecraft.365791.n2. > nabble.com/K3S-and-VLF-tp7628247p7628423.html > Sent from the Elecraft mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > kengk...@gmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to thelas...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Linear thoughts
Hitting the band switch on the KPA500 is a quick way to avoid cycling through the bands sequentially on the K3. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of j...@kk9a.com Sent: Saturday, March 18, 2017 11:49 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Linear thoughts What buttons are you using besides ON and maybe OPER/STBY? John KK9A From: Ed Muns ed at w0yk.com Sat Mar 18 14:25:12 EDT 2017 Based on the excellent KPA500 design, augmented by user experience, and the added comments to Eric's question below, I'm confident Elecraft can define another great product if they so choose. My request is that the button colors be more functional than they are on the KPA500. "Black on Black" is aesthetically very cool in a well-lit environment, but functionally very poor in most actual operational environments. Some of us have replaced the KPA500 button caps with gray and other colors like on the K3, so we can find the buttons more readily. Ed W0YK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 not Seen By Computer after OS upgrade
Same here. No add'l driver needed. Maybe uninstall the FTDI site, restart the computer and, while connected to the internet, plug in the USB device again. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dick Dievendorff Sent: Saturday, March 18, 2017 11:23 AM To: 'Richard Lawn'; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 not Seen By Computer after OS upgrade What I did the first time on several different Windows 10 systems was plug in the USB cable and waited (for several minutes) for Windows to find the required device driver from Windows Update. I've never had to install a device driver from The FTDI site. YMMV... Dick, K6KR -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Richard Lawn Sent: Saturday, March 18, 2017 10:56 To: elecraft@mailman.qth.net Subject: [Elecraft] K3 not Seen By Computer after OS upgrade I bit the bullet and upgrade from Win 7 to 10 this morning in an effort to address some issues I just couldn't live with any longer. All was fine until I plugged the USB cable from my K3 into the computer and nothing. No recognition what so ever. I went to the Elecraft site and downloaded and installed FTDI and Prolific drivers though I think it needed FTDI. Still nothing. I'm puzzeled though as I downloaded two different FTDI driver packages. One was an install package and the other is a folder with no obvious setup file for installation. The folder is labeled CDM v2.12.26 WHQL Certified. That's probably the one I needed to install but am at a loss in how to do that. Some advice would be appreciated. Rick, W2JAZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to d...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 update utility download removed (i.e. blocked) by Norton Internet Security in Windows 7
After I got tired of both Norton and McAfee and dumped them years ago, I have been using AVG without incident for at least a decade now. And doing research via the WEB, I'm all over the place downloading files, etc., from unknown sites as well as dealing with attachments to e-mails daily. AVG has a free version but you must remember to manually update it daily. I willingly pay for good stuff that works, so I have a paid subscription. Costs about $22/year for each machine. I've considered switching to Windows Defender but also avoid fixing things that aren't broken. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Josh Sent: Saturday, March 18, 2017 10:16 AM To: Elecraft Reflector Subject: Re: [Elecraft] KX3 update utility download removed (i.e. blocked) by Norton Internet Security in Windows 7 Dumped Norton many years ago. It's nearly a virus itself. Haven't seen a replacement suggested yet, so.. I've been very happy with NOD32. It's around $30/yr, not the cheapest, but hasn't let me down. Have also heard good reviews of Avast which is (used to be?) free. 73, Josh W6XU Sent from my mobile device > On Mar 17, 2017, at 11:26 PM, n...@comcast.net wrote: > > I will second that suggestion. Norton takes total control of most all programs and sees ham software as virus. Dumped Norton over a decade ago. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Linear thoughts
Same size box as the KPA500, with the internal switching supply. It could actually weigh less than the KPA500. This would be an achievement that would be unique to Elecraft and desirable. The tuner would be in an external box, same width and depth as the amp. If it could be done for twice the price ($4200) of the KPA500, it would have some market. Ron Durie WB4OOA Elecraft K3s-Line IMD __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Linear thoughts
Also there is the issue of the mains power available in the "shack".
The KPA500 runs very well off of a decent 120VAC mains source, as I can
attest from experience. But that is about the limit for a normally (for the
USA) wired home circuit when a power supply for a K3, lights, etc., are
included.
Larger amps will *REQUIRE* a 240VAC circuit which, unlike Europe, we in the
USA seldom have unless special wiring is installed.
73, Ron AC7AC
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill
Johnson
Sent: Thursday, March 16, 2017 3:38 PM
To: Charlie T, K3ICH; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Linear thoughts
Charlie, I think one of the main reasons for switching to a smaller amp was
the weight involved in the 1.5Kw rigs. Just thought I would add back in.
The MJF AB1000 combiner looks interesting, but I would not touch one unless
I knew of many who used one successfully. That way I could get a second
KPA500, and run 1KW which adds the 3db and I could move the separate parts
with ease. :-)
73,
Bill
K9YEQ
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Charlie T, K3ICH
Sent: Thursday, March 16, 2017 5:20 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Linear thoughts
Well, if you've never tried to work truly "weak" signals, I can assure you
that +5 dB WILL make a world of difference.
Otherwise, why would you go to the trouble of installing a ½dB noise figure
pre-amp at the antenna, just to eliminate 2dB of feed-line loss on receive?
Or, stacking a second Yagi to gain at most, +3dB?
Yes, +5dB can be very hard to come by when you're operating at the fringes
of performance.
My thoughts are, if you're gonna run an amp at all, go for legal limit.
Not knocking anyone running 200 or 500 or 700 watts, just my own opinion.
73, Charlie k3ICH
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred
Jensen
Sent: Thursday, March 16, 2017 4:35 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Linear thoughts
Advising Elecraft about producing a larger amplifier is quite a bit above my
pay grade so I won't go there. However, going to 1,500 watts from 500 watts
is a bit less than 5 dB -- a little less than one International Standard
S-unit. 5 dB might come a lot cheaper from an antenna change.
Before purchasing the KPA500, I ran my "1,500 watt Behemoth" at 500 W for
close to a year to see if I could tell the difference. Admittedly, I'm a
casual contester and DX'er, and I operate my ham radio for other reasons
too, but I really couldn't see much if any difference in terms of who I
could work or how long it took to snag the latest expedition.
Operating skill [or lack thereof in my case] was a much bigger factor.
The KPA500 was full QSK which its predecessor was not, which became a big
advantage.
I have since sold the KPA500 [and KAT500] and run 100W from home. My
HOA-Stealth "wire on the fence" is close enough to the house that I
occasionally make something happen [like flash touch-lamps or reset the
u-wave clock], and I figured 500 W might nuke the neighbor's dog who patrols
the other side of the fence. I'm very surprised that the wire,
6 feet high, works as well as it does. If I quest for QRO and "real
antennae," I can always run W7RN remotely.
73,
Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn
On 3/16/2017 12:26 PM, Erik Basilier wrote:
> I recently sold my legal limit tube amp after a bit of a mental struggle.
> The seller in me finally won after I realized that "if I can't lift
> it, I shouldn't own it". I was tempted to replace it with an ALS-1306,
> but I operate RTTY and in that mode the 1306 wouldn't be good for more
> output than a KPA500. Today I received my (new to me) KPA500. However,
> in a contest someone with 1500 Watts will have a big advantage over my
> 500 W, so the subject of higher power may soon come back to me.
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