[Elecraft] Looking at KPA1500
The KPA1500 is right now outside my budget, but there is nothing wrong with dreaming and planning, right? The latest QST reviews the new Palstar amp, which first seemed attractive, but I soon noticed that its continuous carrier capacity is no better than the KPA500. Also, when you add the price of the matching tuner, you are looking at a total price of $5k, which makes the full legal power KPA1500 with included tuner look good at $6k. However, what does dampen my enthusiasm is that the KPA1500 tuner handles swr only up to 3:1 at full power. My main 40m antenna meets that requirement over a significant portion of the band, but at band edges swr can be 4.5:1 or so. The lower bands are where high power is most commonly needed, so it doesn't make much sense to upgrade from my KPA500 only to have to throttle back to 500W on 40m. That begs the question exactly how much power the KPA1500 tuner can handle on 40m. Also, it would be desirable to use higher power on the portion of the band where swr does stay under 3:1. I could set the power to a lower value on the K3 for 40m, but it would be helpful to be able to set the power separately for different band segments. The actual power limit at a higher swr probably depends on the actual impedance presented to the tuner, and not just the swr value. One could perhaps use an antenna analyzer to measure the complex impedance at different frequencies within the band, and then program different drive power levels for the corresponding band segments (if that capability were implemented). Maybe a future tuner design could incorporate sensing of complex load impedance and signal the transceiver to limit drive power accordingly. Or, instead of basing it on load impedance, the design could directly measure voltages and currents within the tuner to prevent excessive voltages and currents from being produced (not dynamically a la ALC, but as a calibration using steady carrier). 73, Erik K7TV __ 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] KPA-1500 failure
A friend of mine's KPA-1500 has just failed. It behaves like half the PA has died, with max output power about 900W, and requiring excessive drive to get that. He has calls in to service but no response yet. Has anybody experienced such a failure? Thanks - Paul KW7Y __ 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] KPA500 Clicks & Pops
"If you can figure out how to keep the relatively thin "Z" panel from expanding and contracting as it is heated and cooled, you will have a solution to the problem." If the Z bracket really is the source of the noise, and I'm not yet convinced it is, then there is no need to stop it expanding and contracting. All that is needed is to change the mechanical interface between the Z bracket and whatever is binding and releasing to cause the clicks. My plan was to put thin Mylar sheet between the Z bracket and the parts to which it is attached. I was going to start with the Z bracket to heat sink interface. I was not willing to do that until I had characterized the Z bracket temperature dynamics and understood the heat flow between the Z bracket and the heat sink. I have the data but no longer have the clicks. 73, Andy k3wyc __ 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 Clicks & Pops
All, If you can figure out how to keep the relatively thin "Z" panel from expanding and contracting as it is heated and cooled, you will have a solution to the problem. It reminds me of my childhood days living with a coal furnace. The furnace had an inner cast iron furnace surrounded by a sheet metal shell as the air plenum. It was comforting on a cold winter's morning to hear that sheet metal expanding because that was the 1st indication that warm air was coming. It was my job to shake down the ashes, put coal in and stoke up the fire in the mornings. 73, Don W3FPR On 10/16/2018 5:59 PM, Bob McGraw K4TAX wrote: I do run 400 watts or so on digital modes. Issues are not really noted on SSB or CW modes. I've set the Fan Ctr to 2 and 3 and still noted the issue Was recently showing my K Line to some hams friends. They commented rather negatively on the point. Bob, K4TAX Sent from my iPhone On Oct 16, 2018, at 4:52 PM, Dauer, Edward wrote: I've not experienced the problem with kit-built S/N 0651. But then, I have never used it on high duty cycle data modes. Ted, KN1CBR -- Message: 25 Date: Tue, 16 Oct 2018 14:13:55 -0700 From: Dennis Moore To: Elecraft Reflector Subject: Re: [Elecraft] KPA500 Clicks & Pops Message-ID: <0497f5c1-6e76-75be-53c4-4acf668d9...@mail4life.net> Content-Type: text/plain; charset=utf-8; format=flowed I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled units? Dennis NJ6G __ 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 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 arch...@mail-archive.com
Re: [Elecraft] KPA500 Clicks & Pops
I do run 400 watts or so on digital modes. Issues are not really noted on SSB or CW modes. I've set the Fan Ctr to 2 and 3 and still noted the issue Was recently showing my K Line to some hams friends. They commented rather negatively on the point. Bob, K4TAX Sent from my iPhone > On Oct 16, 2018, at 4:52 PM, Dauer, Edward wrote: > > > I've not experienced the problem with kit-built S/N 0651. But then, I have > never used it on high duty cycle data modes. > > Ted, KN1CBR > > > >-- > >Message: 25 >Date: Tue, 16 Oct 2018 14:13:55 -0700 >From: Dennis Moore >To: Elecraft Reflector >Subject: Re: [Elecraft] KPA500 Clicks & Pops >Message-ID: <0497f5c1-6e76-75be-53c4-4acf668d9...@mail4life.net> >Content-Type: text/plain; charset=utf-8; format=flowed > >I rarely hear anything from my KPA500-F. Serious question, I wonder if >those with the kit experience more noise than those with factory >assembled units? > >Dennis NJ6G > > > > __ > 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 arch...@mail-archive.com
Re: [Elecraft] KPA500 Clicks & Pops
On 10/16/2018 1:56 PM, Bob McGraw K4TAX wrote: I've tried to determine where the clicks originate without success. This is a much discussed issue. Check the archive. Call or email Elecraft if you want to know more. 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 arch...@mail-archive.com
[Elecraft] KPA500 Clicks & Pops
I've not experienced the problem with kit-built S/N 0651. But then, I have never used it on high duty cycle data modes. Ted, KN1CBR -- Message: 25 Date: Tue, 16 Oct 2018 14:13:55 -0700 From: Dennis Moore To: Elecraft Reflector Subject: Re: [Elecraft] KPA500 Clicks & Pops Message-ID: <0497f5c1-6e76-75be-53c4-4acf668d9...@mail4life.net> Content-Type: text/plain; charset=utf-8; format=flowed I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled units? Dennis NJ6G __ 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] W2 wattmeter for sale
Hello everyone, I have an excellent condition Elecraft W2 wattmeter for sale. It has the 200 watt HF +6 meter coupler. I will include the coupler cable, RS-232 data cable, 12V DC power cable with powerpole connector installed, and the original owner's manual. There are no issues with the meter. $250 shipped and insured to any US destination. I can accept payments through Paypal, cash, check, or money order. Doug W4DAS --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus __ 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 Clicks & Pops
Mine was a kit and does the same thing. Sort of like Railroad Welded Rail, in the summer it expands and shrinks in the winter. We had the same issue with #6 solid copper on the communications lines. It only does it on the KPA500 when I do a lot of RTTY or FT8. Very seldom on SSB or CW. ED..AB4IQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dennis Moore Sent: Tuesday, October 16, 2018 4:14 PM To: Elecraft Reflector Subject: Re: [Elecraft] KPA500 Clicks & Pops I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled units? Dennis NJ6G On 10/14/2018 19:52, Bob McGraw K4TAX wrote: > What is the recommended solution to stopping the clicks and pops from > the KPA500 as the amp heats during transmission and cools during > receive? I've seen one that suggested replacing the screws in the Z > bracket with 4-40 x 1/4".Any traction to this? > > The amp performs absolutely fantastic. The clicks and pops are more > annoying when working high duty cycle modes. > > Thanks in advance. > > 73 > > Bob, K4TAX > > KPA500 s/n 3519 __ 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 ab...@comcast.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] KPA500 Clicks & Pops
Mine was a kit (sn 267) and I've never heard any noises from it whatever. Kent K9ZTV On 10/16/2018 4:13 PM, Dennis Moore wrote: I wonder if those with the kit experience more noise than those with factory assembled units? --- This email has been checked for viruses by AVG. https://www.avg.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 Clicks & Pops
I did a FT on the device and never an issue. Building requires a bit of electro mechanical skills that some do not have. When I read the issues, I wonder about how it was built or modified. 73, Bill K9YEQ https://wrj-tech.com/ -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Dennis Moore Sent: Tuesday, October 16, 2018 4:14 PM To: Elecraft Reflector Subject: Re: [Elecraft] KPA500 Clicks & Pops I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled units? Dennis NJ6G On 10/14/2018 19:52, Bob McGraw K4TAX wrote: > What is the recommended solution to stopping the clicks and pops from > the KPA500 as the amp heats during transmission and cools during > receive? I've seen one that suggested replacing the screws in the Z > bracket with 4-40 x 1/4". Any traction to this? > > The amp performs absolutely fantastic. The clicks and pops are more > annoying when working high duty cycle modes. > > Thanks in advance. > > 73 > > Bob, K4TAX > > KPA500 s/n 3519 __ 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 k9...@live.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 Clicks & Pops
Mine is a KPA500-F s/n 3519 thus it is factory assembled. 73 Bob, K4TAX On 10/16/2018 4:13 PM, Dennis Moore wrote: I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled units? Dennis NJ6G On 10/14/2018 19:52, Bob McGraw K4TAX wrote: What is the recommended solution to stopping the clicks and pops from the KPA500 as the amp heats during transmission and cools during receive? I've seen one that suggested replacing the screws in the Z bracket with 4-40 x 1/4". Any traction to this? The amp performs absolutely fantastic. The clicks and pops are more annoying when working high duty cycle modes. Thanks in advance. 73 Bob, K4TAX KPA500 s/n 3519 __ 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 arch...@mail-archive.com
Re: [Elecraft] KPA500 Clicks & Pops
I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled units? Dennis NJ6G On 10/14/2018 19:52, Bob McGraw K4TAX wrote: What is the recommended solution to stopping the clicks and pops from the KPA500 as the amp heats during transmission and cools during receive? I've seen one that suggested replacing the screws in the Z bracket with 4-40 x 1/4". Any traction to this? The amp performs absolutely fantastic. The clicks and pops are more annoying when working high duty cycle modes. Thanks in advance. 73 Bob, K4TAX KPA500 s/n 3519 __ 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 Clicks & Pops
I've tried to determine where the clicks originate without success. I've loosened screws on the top and right side and tightened screws on the top and right side. No difference. Perhaps someone at Elecraft will add a comment in this regard. I did observe that the 5 screws at the center of the top cover are longer than the others. I'm really at a loss as to the somewhat annoying Rice Krispies Snap Crackle and Pop. Still love the amp in all other aspects. 73 Bob, K4TAX On 10/16/2018 8:52 AM, ANDY DURBIN wrote: I found this quite annoying too. My approach was to try to understand how the Z bracket temperature varied relative to the heat sink temperature. I placed a thermistor on the front end of the Z bracket and another on the heat sink fin closest to the Z bracket. I logged the standard PA temperature and these additional thermistor temperatures for every transmission I made (still do). I established baseline temperature characteristics and planned to use this data to see if any mods I made changed the characteristics. Surprise! - When I though I had enough data to move on to the next step in the investigation it stopped clicking. Adding the thermistors only required removal of the front panel and the Z bracket screws were no touched. It continued to click after the thermistors were added and then stopped a few weeks later. The data show the rapid change in temperature is at the PA sensor only. The heat sink and Z bracket change much more slowly and never have a large temperature difference. Their temperatures do cross over though. One problem with temperature logging is that I had no data, except for my test notes , on the clicks themselves. I had planned to added some inexpensive sound detection modules and add this data to the logger. That's on hold until the clicks come back. It's really nice not to have the amp click continuously on every FT8 transmission. I wish I knew what fixed it. 73, Andy k3wyc __ 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 arch...@mail-archive.com
Re: [Elecraft] [KX3] Short whip operating tips
How are folks ordering this antenna? The web site says “coming soon” with no place to order it now. I signed up at Dayton for the advanced notice list, but never got notified. Are these early orders coming from that list? 73, Carl Sent from my iPhone === Carl Jón Denbow, N8VZ 17 Coventry Lane Athens, Ohio 45701-3718 c...@n8vz.com www.n8vz.com EM89wh IRLP 4533 Echolink 116070 PSK and JT65 Forever! === > On Oct 16, 2018, at 12:02 PM, Wayne Burdick n...@elecraft.com [KX3] > wrote: > > Having operated pedestrian mobile many times, I’d like to offer a few > suggestions for those new to the use of short whips (like the AX1). These and > other tips appear in the AX1 manual. > > * Elevate the antenna whenever possible. For example, if you’re using a KX2, > HT-style, your transmitted signal will almost always be stronger if you’re > standing rather than sitting on the ground. (Exception: sitting on the edge > of a cliff is probably just as good as standing. Don’t do anything risky :) > > * Initially, try to find strong stations to call (S7 or higher), especially > when using SSB. High signal strength at your end is often indicative of good > propagation and/or that the station is using a gain antenna. > > * Try the higher-frequency bands first. 17 meters in particular is an > outstanding QRP band. When I call strong stations on this band using 10 W SSB > and the AX1, my success rate is something like 80%. > > * ALWAYS use a counterpoise wire (one is supplied with the AX1). Otherwise > your transmitted signal will be down as much as 20 dB. > > * If you use the AX1 with the AXT1 tripod adapter, use a short length of > coax, especially on 17 and 15 m were the rig’s ATU is required to achieve > resonance. > > Happy hiking— > > Wayne > N6KR > > > http://www.elecraft.com > > __._,_.___ > Posted by: Wayne Burdick > Reply via web post• Reply to sender • Reply to group • > Start a New Topic • Messages in this topic (1) > > Have you tried the highest rated email app? > With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app > on the market. What are you waiting for? Now you can access all your inboxes > (Gmail, Outlook, AOL and more) in one place. Never delete an email again with > 1000GB of free cloud storage. > > VISIT YOUR GROUP > • Privacy • Unsubscribe • Terms of Use > > SPONSORED LINKS > > > > . > > > __,_._,___ __ 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] AX-1
Thanks for the report, Thaire. As we recommend in the AX1 owners manual, it’s a good idea to also bring along wire for a tree-based antenna for times when conditions are very poor, and/or you have more time to set up. Have fun! Wayne N6KR http://www.elecraft.com > On Oct 16, 2018, at 8:59 AM, Thaire Bryant wrote: > > I received my new AX-1 yesterday at noon at the post office in New Hampshire. > By 1:30 (1700 UTC) I had it set up on a 4’ tripod on the deck, the > counterpoise attached to the KX3 and with 10 watts worked LZ and HA on 20 M > CW! > > Wayne, thank you! This will be my new SOTA antenna. > > Thaire. W2APF > __ > 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
[Elecraft] Short whip operating tips
Having operated pedestrian mobile many times, I’d like to offer a few suggestions for those new to the use of short whips (like the AX1). These and other tips appear in the AX1 manual. * Elevate the antenna whenever possible. For example, if you’re using a KX2, HT-style, your transmitted signal will almost always be stronger if you’re standing rather than sitting on the ground. (Exception: sitting on the edge of a cliff is probably just as good as standing. Don’t do anything risky :) * Initially, try to find strong stations to call (S7 or higher), especially when using SSB. High signal strength at your end is often indicative of good propagation and/or that the station is using a gain antenna. * Try the higher-frequency bands first. 17 meters in particular is an outstanding QRP band. When I call strong stations on this band using 10 W SSB and the AX1, my success rate is something like 80%. * ALWAYS use a counterpoise wire (one is supplied with the AX1). Otherwise your transmitted signal will be down as much as 20 dB. * If you use the AX1 with the AXT1 tripod adapter, use a short length of coax, especially on 17 and 15 m were the rig’s ATU is required to achieve resonance. Happy hiking— Wayne N6KR http://www.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] AX-1
I received my new AX-1 yesterday at noon at the post office in New Hampshire. By 1:30 (1700 UTC) I had it set up on a 4’ tripod on the deck, the counterpoise attached to the KX3 and with 10 watts worked LZ and HA on 20 M CW! Wayne, thank you! This will be my new SOTA antenna. Thaire. W2APF __ 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] Re(3): dxlab
Do not click on the possibly dangerous link from this spam that was sent to the Elecraft list. Apparently the spam sender is spoofing KB3ILS's email address, or has hacked his email program. We have temporarily put the kb3...@comcast.net email address in list moderation mode to prevent further spam. Please, no list comments on this. Email the moderator if needed. 73, Eric /elecraft.com/ On 10/16/2018 1:56 AM, Keith Thomas wrote: http:// Hello! I have something really wonderful for you! __ 16.10.2018 4:56:26 With Purefit KETO my mood improved. __ 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] K3 2878 no rx (sort of)
Elecrafters, after a long qso on uhf i returned to my muted K3 (soon to be 10 years old) , cranked up the volume and heard...zzz. No audio from the speaker or headphone. RX was ok, i could see signals on the LP-Pan ,TX ok, power out ok. Power cycle didn't help. A slap on the cover imediatelly restored rx/audio to normal level. What problem am i experiencing here? Is ist the front panel pin header? -- Ohne CW ist es nur CB.. 73, Martin DM4iM __ 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] KPA500 Clicks & Pops
I found this quite annoying too. My approach was to try to understand how the Z bracket temperature varied relative to the heat sink temperature. I placed a thermistor on the front end of the Z bracket and another on the heat sink fin closest to the Z bracket. I logged the standard PA temperature and these additional thermistor temperatures for every transmission I made (still do). I established baseline temperature characteristics and planned to use this data to see if any mods I made changed the characteristics. Surprise! - When I though I had enough data to move on to the next step in the investigation it stopped clicking. Adding the thermistors only required removal of the front panel and the Z bracket screws were no touched. It continued to click after the thermistors were added and then stopped a few weeks later. The data show the rapid change in temperature is at the PA sensor only. The heat sink and Z bracket change much more slowly and never have a large temperature difference. Their temperatures do cross over though. One problem with temperature logging is that I had no data, except for my test notes , on the clicks themselves. I had planned to added some inexpensive sound detection modules and add this data to the logger. That's on hold until the clicks come back. It's really nice not to have the amp click continuously on every FT8 transmission. I wish I knew what fixed it. 73, Andy k3wyc __ 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] Re(3): dxlab
http://robertbobpainter.com/tbmclcms/839632.php?10032=fmz&4295=358951=645770871 http://robertbobpainter.com/tbmclcms/839632.php?10032=fmz&4295=358951=645770871 Hello! I have something really wonderful for you! __ 16.10.2018 4:56:26 With Purefit KETO my mood improved. Out of an alley on our right. Come into thе hall. I shall be at my surgery until ten a. I have something really wonderful for you! i started and never looked back Keith Thomas 16.10.2018 4:56:26 __ 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
