Re: [Elecraft] Spurious
Minor issue?? Polluting the bands with spurs is a "minor issue"? Thankfully the immediate fix is trivial! Jerry AI6L -Original Message- From: Ken Chandler [mailto:g0...@sky.com] Sent: Tuesday, December 22, 2009 8:45 AM To: Phil Hystad Cc: Elecraft Reflector Subject: Re: [Elecraft] Spurious Well I have done this yesterday ie removed / disconnected the internal speaker so it cannot occur again. It's a fix until Wayne es the boys can move up on this minor Issue. Ken..G0ORH sn3759 Sent from my iPhone __ 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
Re: [Elecraft] K3 K144XV Questions
Regarding 3., I ordered one the first day that they became available and have heard nothing yet as to when mine will be shipped. Jerry AI6L -Original Message- From: Phil Hystad [mailto:k7...@comcast.net] Sent: Friday, January 08, 2010 9:55 AM To: Elecraft Discussion List Subject: [Elecraft] K3 K144XV Questions A few questions about the K144XV... 1. I noticed from the manual that the chassis stiffener that comes with the K144XV seems to be the same one that I already have in my late model K3 (3799). Is this true? 2. Although I can look it is easier to ask: would it also be true that the need to solder in a new power connector to the RF board, or would that also be already on my late model K3? 3. Is there a waiting queue? If I ordered now, about how long until delivery? In my case, I won't be able to get to it until February but I was curious if the waiting list is longer then that in which case I would order right away. 73, phil, K7PEH "Still Learning How to use my new K3 (3799)" __ 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
Re: [Elecraft] K3/100 -Second floor- no RF ground ??
Chuck, I operate a K3/100 from a 2nd story shack and have significant RF ground problems. I do have a good powerline ground, but that is irrelevant. My antenna is a 100 ft sloper, centerfed with over 100 ft of 450 ohm window line (perpendicular to the antenna for 75 ft). It will "load up" on all bands 160M through 6M, with varying degrees of effectiveness. I cannot run my amplifier (Alpha 78) at more than 200-300 watts on most bands without significant RF problems, including tripping GFIs. I intend to try to alleviate the problems with a tuned ground, using a series-tuned resonant circuit in a counterpoise system hanging out the window, an arrangement similar to the MFJ 931. (If you look inside one of those, you will see that it is very cheaply made. You can do much better with your own coil, capacitor, and RF ammeter.) By the way, I can operate the K3/100 barefoot without apparent adverse effects due to the bad RF grounding. Another issue only distantly related to grounding is that the K3, like the K2, is extremely susceptible to ESD strikes. That is a huge problem for me in the dry, high desert of Nevada. You cannot touch anything here without drawing a significant spark, any time of year. I quickly caused expensive major damage (destruction of firmware, etc) to my K2/100 by touching it, even though it was carefully grounded to power system ground. The K3 is upset by such strikes also. I try to avoid damage by using an operating table with conductive paint (Walmart) and a good (DC) ground system, so that I can continuously discharge myself before and while operating. The reason for the ESD susceptibility of the K3 and K2 is flawed shielding design and (apparently) lack of ESD mitigation in the circuitry/layout. Jerry AI6L -Original Message- From: callen1155 [mailto:callen1...@yahoo.com] Sent: Wednesday, February 24, 2010 2:19 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3/100 -Second floor- no RF ground ?? Hello guys, I'm planning on purchasing a K3/100 but am concerned about my second floor shack and RF problems. First of all: 1) I don't have an RF ground (don't really want to drill thru the house and siding for the ground strap) and 2) my antenna is a semi-indoor/attic dipole (HOA). I'm running a coax from the second floor radio to the attic where i attach to a dipole (no balun) and the dipole runs the length of the house each way and out the eaves where both wires run out about 35 yards to the trees. I'm using my K2/15 and don't have problems but previously with my old Knwd TS 830 at about 100 watts the vibroplex bug would 'bite' me. I'd also get some RFI on the TV (didn't try any filters to prevent it). I know both of the above arrangements are potential sources for RF problems. What I don't know is whether RF problems (both the 'burn' and RFI) are radio related; i.e. are some radios more prone cause issues and how is the K3/100 in this regard as compared to the TS 830? (this may be a non-question-- i just don't have enough experience with different radios to know). So I'm wonder if any of you operate a K3/100 from a second floor shack, with no RF ground, (guess it's too much to ask about a semi-indoor antenna) and if you're experiencing RF problems? Also, if I experience RF problems with the K3 do any you have any experience with an "Artificial RF Ground" such as the MFJ-931? Sorry about being long winded. Hope I'm not 'destined' to order a K3/10 instead. thanks again. chuck af4xk -- View this message in context: http://n2.nabble.com/K3-100-Second-floor-no-RF-ground-tp4628979p4628979.html Sent from the [K3] 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
Re: [Elecraft] K3/100 -Second floor- no RF ground ??
Steve, I have tried the "barefoot" approach here, nothing seems to work. One draws sparks in our rooms with wood flooring also. NV is an extreme environment! I have had "RF ground" problems here while using various antennas, some fed with coax, some with balanced feed, baluns, etc. One problem, of course, is having the rig connected to the power line ground, which is on the opposite side of the house, and you know how big the ground leads are that are run through the house. RF pickup on the ground system is substantial. Jerry AI6L -Original Message- From: Steve Ellington [mailto:n...@carolina.rr.com] Sent: Thursday, February 25, 2010 11:46 AM To: Jerry T. Dowell; 'callen1155'; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3/100 -Second floor- no RF ground ?? As for ESDSomeone here suggested going barefooted. I've verified this. It works. Socks are not allowed! This also lets you run "barefoot" while running the amp. Replacing carpet with wood flooring helps too but a bit more expensive. Your RFI problems sound like common mode current on your feeder. I would try changing the length. My final solution here was to put the MFJ-998 1.5kw auto tuner out at the antenna "130' inverted L" and run coax into the house. Steve N4LQ __ 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
Re: [Elecraft] KREF3 External Reference Option
I agree with you, Nige. Jerry AI6L -Original Message- From: Nige [mailto:ni...@hotmail.com] Sent: Thursday, September 09, 2010 2:40 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KREF3 External Reference Option I appreciate everyone's enthusiasm to convince me and was warmed by an off-list message from Wayne but as I explained to Wayne, my Flex is accurate to less than 0.03 Hz @ 50 MHz and the suggested specification for the KREF3 is about 1Hz @ 20 MHz. That is an order of magnitude away from what I consider acceptable when driven by a Reference to 10e-14/H. I'll keep watching the evolution of this in case the boys at Ele can work their magic. All the best, Nige. -- __ 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
[Elecraft] [K3] Filter prices
The high prices of the roofing filters for the K3 and optional filters for other rigs reminds me of a little history. In the very early '80s, I desired to purchase a CW filter for an Astro 200, long after CIR went out of business. I happened to be visiting Phoenix, AZ for a few days, so I dropped by Network Sciences, the company that had made the Astro filters and had also been the filter supplier for Drake, Atlas and other manufacturers. It was still there, but obviously about to fold. I met with Howard Falk, the owner, who said he could supply me with an 8-pole CW filter for the Astro. We chatted a bit while a technician, apparently the only other person around, checked out my filter. Howard said that he had essentially been driven out of business by the Japanese filter manufacturers. Drake and others had switched to Japanese suppliers since they could get the filters for a little over $1 each, whereas his cost was over $2 each. Note that there were no middlemen. Drake was selling their filters for $40 or $50 each, I forget which. A tidy profit. Howard charged me $40 for that CW filter, by the way. Since Howard's tale was only one data point for me, it would be interesting to verify it through other sources. Inflation since that time has been about a factor of 2.6, according to official US Government figures: http://data.bls.gov/cgi-bin/cpicalc.pl Some of us would disagree with the official numbers, putting it closer to a factor of 10, but the official factor is close to the actual increase in retail prices for the filters. If the costs have gone up in that proportion, the profits are huge. Especially if one figures in the interim advances in manufacturing, such as monolithic structures, etc. Of course, there is at least one middleman involved with the Inrad filters, increasing the cost to Elecraft. No doubt high markups are necessary along the line somewhere because of the low volumes involved. Nevertheless, I find it especially disturbing having to pay these modern prices considering that the filters have apparently not been designed or chosen for good IMD performance or advantageous group delay characteristics. Also, some filters are reputed to have been defective. Of course, the filters may not be totally to blame for the mediocre front end performance of the K3 (compared with the professional-level performance that some of us had hoped for.) Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Problems using a QRO amp with the K3
My old Alpha 78 works just fine with full breakin on the K3. I just key the amp with the K3 and did not have to worry about time delays, etc. I have NEVER used ALC with any rig. Jerry AI6L -Original Message- From: Richard Robbins [mailto:[EMAIL PROTECTED] Sent: Sunday, July 13, 2008 11:06 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Problems using a QRO amp with the K3 Anyone out there using a QRO with the K3? I can't seem to get the amp working with the K3. I have previously used the amp with the 480HX, 1000MP and 706 MIIG. I am using the key out circuit on the back which does activate the relay in the amp but when I release the ptt, the amp stays in transmit and will not release. Before I did use the ALC circuit with the amp but I have been told I do not need to use an ALC circuit with the K3. Do I need a separate t/r relay between the radio and the amp? Is there some other menu item I have overlooked? Any help will be appreciated. 73, Richard N4WDU -- View this message in context: http://n2.nabble.com/Problems-using-a-QRO-amp-with-the-K3-tp524929p524929.ht ml Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] ESD Damage Question
I suspect that the K3 does not have any design features for minimizing susceptibility to ESD. The K2 apparently does not. When I moved to NV from CA I had a rude awakening. The humidity here is low, often in single digits. I always draw sparks to every piece of metal, e.g., light switch plate screws. I found that the K2 would go into hyperspace and require an off/on reset whenever I reached for it and drew a spark to the case. One day I sparked to the case containing the KPA100 and KAT100 and the amp stopped working properly. The firmware probably got zapped. I restored function by putting in a new firmware chip and bringing all the mods up to date. Since then, I have grounded everything to power ground and have an operating table with conducting paint (Walmart). It is now easy for me to keep discharged to the table. Nonetheless, the K2 still burps if I happen to spark to the case, even though it is well grounded. My K3 was set up with great care and attention to grounding, but I expect that it may also respond to case discharges. I sure am going to try to avoid testing that surmise! Jerry AI6L -Original Message- From: Mike Thornton [mailto:[EMAIL PROTECTED] Sent: Sunday, July 27, 2008 2:30 PM To: elecraft@mailman.qth.net Subject: [Elecraft] ESD Damage Question I have my K3 on order, and plan to take all of the standard ESD precautions when I build it. My question is about after it is built and in operation. I just got through paying to have a new control board put in my Kenwood TS-2000 because it apparently had some ESD damage. I always disconnect my gear during thunderstorms, etc., so I assume it came in as a result of having the audio input and output and data lines connected to other equipment. I would hate to have a repeat of that situation with the K3. Does anyone have any thoughts about the K3 and static damage or any special precautions that should be taken? Thanks for your help. 73, Mike, WC0L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3: KRX3 Shipping?
Is anyone receiving their KRX3s? My order has been in for over 13 months, but no sign of it yet! The S/N of my K3 is 467. Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KPA500
And too quiet! It would not be advisable to operate a linear supply in close proximity to the K3 or the K2. The resulting unwanted modulations have been discussed previously. Jerry AI6L -Original Message- From: Bob McGraw - K4TAX [mailto:rmcg...@blomand.net] Sent: Sunday, April 18, 2010 3:02 PM To: Doug Faunt N6TQS +1-510-655-8604 Cc: elecraft@mailman.qth.net; m0...@alphadene.co.uk; d...@w3fpr.com Subject: Re: [Elecraft] KPA500 I'll pass on linear supplies. Too heavy, too inefficient. 73 Bob, K4TAX - Original Message - From: "Doug Faunt N6TQS +1-510-655-8604" To: Cc: ; ; Sent: Sunday, April 18, 2010 4:56 PM Subject: Re: [Elecraft] KPA500 > It's not a switcher. As is common for linear power supplies (and not > uncommon for switchers), there's an input voltage selector as part of > the input power connector/fuse/switch combo. > > Since the power transformer is 15 of the 22 pounds weight, one of my > thoughts was to ship that part (or an extra) ahead when traveling, and > when I asked was told that currently it takes about 15 minutes to > install, but that time might be cut. > > 73, doug > > From: "Bob McGraw - K4TAX" > Date: Sun, 18 Apr 2010 16:24:43 -0500 > > Any switching supply today and one that's "worth it's salt" should > operate > satisfactorily from 100 VAC to 250 VAC. So 120 VAC or 230VAC should > not be > of conern. > > 73 > Bob, K4TAX > > > - Original Message - > From: "Don Wilhelm" > To: "David Ferrington, M0XDF" > Cc: > Sent: Friday, April 16, 2010 3:40 PM > Subject: Re: [Elecraft] KPA500 > > > David, > > > > Because not all have hamshacks that are wired for 220 volts. If the > > space was not wired specifically for hamshack use, there is likely to > be > > only 120 volt receptacles available. Up to 1000 watts draw (500 > watts > > with 50% efficiency) on a normal 120 volt 15 amp circuit is practical, > > but attempting to run more than becomes marginal. > > > > 73, > > Don W3FPR > > > > David Ferrington, M0XDF wrote: > >> I'm intrigued, obviously we'd look for 220v over here, but why not > 120v > >> in US? > >> 73 de M0XDF, K3 #174 > __ 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
[Elecraft] K3 Received - Mostly
Received my K3 today, ordered June 20. Unfortunately, it seems to be missing some hardware. Most importantly, all the 2D fasteners! (Unless they are hidden in something other than the RF Misc Bag.) No assembly until I receive those! I think that this is the first time I have ever had an Elecraft shipment that was short parts, after building a complete K2/100 system with all the goodies. Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 External Reference input
You bet! That is one of the reasons I bought a K3. Jerry AI6L -Original Message- From: Philip Theis [mailto:[EMAIL PROTECTED] Sent: Friday, February 22, 2008 4:50 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 External Reference input Is there interest among the group for the necessary parts to input a disciplined 10MHz signal to control frequency? We all know there is a place holder on the back panel, but Gary just told me there were no plans. In April Wayne said it was coming but the price hadn't been set. Just wondering if anyone else out there has an interest like I do. 73, Phil K3(352)TUF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Mojo
I am happy to report that the K3 is not lacking in the traditional mojo. My first QSO with the K3 was TX5C, followed by working them all bands 160M through 15M CW and SSB, excepting 160M SSB and 40M SSB. This was barefoot with one antenna, a dipole at 15 ft. For 160, I had to load just the center conductor of the coax, disconnecting the shield. The mojo approaches that of the K2/100, with which I worked VP6DX CW and SSB 160M-15M excepting 160 SSB. It took much less time with the K2, but that may have been due to different operating procedures between the two DXpeditions. My first RTTY QSO with the K3, by the way, was with VK9NS on 17M. For that I used MTTY with the AFSK A mode. It is interesting to note that the K3 itself seemed to do a better job decoding than MTTY. Perhaps the difference would disappear with optimum setup. It's a keeper! Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] ktcx03-1 and phase noise
No. Jerry AI6L -Original Message- From: Ken [mailto:[EMAIL PROTECTED] Sent: Saturday, April 05, 2008 2:42 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] ktcx03-1 and phase noise Hello Engineers! Am I right in thinking that the 1 ppm TCXO will have less phase jitter - hense lower phase noise? ken K5wk ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 Keying - minority opinion?
I also would like Ultimatic mode implemented. Jerry AI6L -Original Message- From: Jack Regan [mailto:[EMAIL PROTECTED] Sent: Saturday, September 06, 2008 3:23 PM To: elecraft@mailman.qth.net Subject: RE: [Elecraft] K3 Keying - minority opinion? Wayne (and Gary) I hope you and Gary will reconsider adding Ultimatic/Single Lever Paddle support to the K3 internal keyer. I think that more than Don, Dave and myself would welcome that addition to the K3. The elegance of the K3, a rig that rivals and even surpasses many of the very high end radios, is diminished by the need to use an external keyer to use a mode that many find invaluable. Removing the need to add another piece of gear to the table top is not a minor inconvenience. The small size of the K3 seems to be an attempt to make it convenient for field/portable use and to then require another piece of gear to make it work seems to diminish its attempt to reach that goal. Jack, AE6GC, KX1 1403, K3 1433 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3: Output power on PSK31 and AFSK
I am running beta 2.63/1.95 firmware. Although power output is normal in CW, USB and LSB modes (setting SSB to operate with several bars of ALC), I can only get about 10-20W out on PSK31 and 50-60W out on AFSK before ALC kicks in. This is the case whether I use LINE IN or FP/RP MIC connections for the input. It seems to me that I was able to comfortably get at least 50W out in these modes when I first tried them several months ago, although I am not sure of that. The low power also occurs if I use USB instead of DATA A for the digital signals. Has anyone else run into this problem? Am I forgetting something? Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3: Output power on PSK31 and AFSK
Thanks to everyone for the information on setting up the K3 for digital modes. My low power problem was solved by running TX gain calibration and by setting the LINE IN gain for a couple of bars on the ALC indicator. Also, I finally realized that most wattmeters will indicate half the actual power on PSK since the spectrum is two-tone. This will be the case for all wattmeters that actually measure the RF voltage, as contrasted with the bolometer type. Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Prices
Now that the K3 has been announced, it sure would be nice, for budgeting purposes, to have some idea of the prices of the 1500W and 800W amps. Then again, it is said that if one has to ask the price, one cannot afford it! Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Manual
Are there any plans to immediately put the K3 manual on the website for download? Lacking any specific performance information, the manual would help us understand the design and make a decision on whether to purchase a K3 before test results, complete details, etc are available. Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Solder shelf life
I bought some Kester solder in 1953, used it throughout the years, and still have some left. It works just fine, better in some respects than solder that I bought more recently. I used it occasionally in construction of my K2/100 where I needed the larger diameter solder. Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] OT: Decoding high speed CW
My Conditional Class code exam in 1954, administered by an Extra Class ham, was mixed code groups (5-letter as I recall) sent from an old Signal Corps manual at 15 wpm or so with a bug. I imagine that a few others who lived in the boondocks had similar experiences. The rules, of course, called for plain language text. Jerry AI6L -Original Message- From: lstavenhagen [mailto:lstavenha...@hotmail.com] Sent: Wednesday, March 30, 2016 1:00 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: Decoding high speed CW Oops, my apologies: one of those was me, my excuse will have to be that it was in 1973 and I guess those memories are no longer what they used to be! I probably mixed that up with my code practice tapes, which definitely did have 4 letter code group parts 73, LS W5QD Mike Morrow-3 wrote >> Code groups were never part of ham exams at any speed. > > Exactly! Yet some report, even here in the past few days, that their ham > Morse exams were random character code groups. Thanks for information to > the contrary that can be neither doubted nor disputed! > > 73, > 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] Selling Synths
For sure! I wish that I had not sold most of my Apple stock over the last couple of years! Jerry AI6L -Original Message- From: Phil Wheeler [mailto:w...@socal.rr.com] Sent: Wednesday, February 25, 2015 2:39 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Selling Synths On 2/25/15, 10:46 AM, jim wrote: > Outrageous profits for products/services do not last a long time in the > marketplace. Competition comes in. Apple comes to mind. Really? Apple still seems to be doing quite well :-) Phil W7OX __ 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] EMP radio
Oh yes! Most critical military equipment is designed to minimize the effects of EMP and nuclear radiation. I spent several years of my career determining susceptibilities and designing circumventions. It is not difficult. Jerry AI6L -Original Message- From: Roland Whitsitt [mailto:n5...@yahoo.com] Sent: Tuesday, May 31, 2011 1:01 PM To: elecraft@mailman.qth.net Subject: [Elecraft] EMP radio I wonder if anybody has considered a modern day transceiver that is resistant to an emp event, either solar or manmade. One good solar emp and only the old timers will be on the air with their tube rigs. Wonder if the military thinks about these things. H. de n5vwm Sent from my iPhone __ 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
Re: [Elecraft] KPA500 Kits
I received shipping confirmation for my kit yesterday. Have patience! Jerry AI6L -Original Message- From: Jim Brown [mailto:j...@audiosystemsgroup.com] Sent: Monday, June 06, 2011 10:41 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 Kits On 6/6/2011 8:27 AM, Rob May wrote: > I don't think anyone has received a kit or even shipping confirmation. I really wish Elecraft would give a realistic ship date instead of stringing us along. Elecraft is a small company -- they are my neighbors, including some of their employees. They have always had the top priority of doing it right. From what I can see by watching this reflector, they're currently making sure that the building instructions make sense by having a few folks close to them build a kit from the instructions and re-writing as needed. I'm waiting for a kit, and I'm happy to know that it will be "right" when I get it. 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
[Elecraft] KPA500 Kits
I ordered about 2 hours after the window opened online also. No tracking number was given with my confirmation, and my debit card has not been billed, so perhaps the fat lady has not sung yet! Jerry AI6L >>>>>>>>>>>> Bill Hammond wham727 at aol.com Tue Jun 7 13:54:19 EDT 2011 I was told that I was #40 in line and I ordered two hours after it became available on line. >>>>>>>>>>>>>>>>> On Jun 7, 2011, at 12:36 PM, Mike Fatchett W0MU wrote: > You must have been number one in line! Grats! > > On 6/7/2011 9:37 AM, Jerry T. Dowell wrote: >> I received shipping confirmation for my kit yesterday. Have patience! >> >> Jerry AI6L >> __ 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
[Elecraft] KPA500 kits
Just found out that my kit has not shipped. False alarm. I added an item to the order and was sent a copy of the revised invoice, which showed a shipping date of yesterday. Indeed, no kits have shipped yet. Sorry for raising false hopes! Jerry AI6L __ 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
[Elecraft] [Fwd: One Man's Attempt To Save Morse Code]
Egad, he left out the punctuation! Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
FW: [Elecraft] CW: Best low cost iambic key?
""You never know until you try them. The K8RA keys at: http://www.k8ra.com/ I have one(P-4) and love it. Different sizes for different people. Dick, NJ9K "" I bought a K8RA P-1 many years ago when they were somewhat cheaper. It seems to work OK, but the workmanship left much to be desired. I now use a Begali magnetic, which is a whole lot more expensive and a whole lot better key. Perhaps the best bet for low cost would be a used Bencher. I got mine for $20 at a swap meet, and it served well for many years. Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Maxwell's Equations.
The two volumes of Maxwell's "A Treatise on Electricity and Magnetism" were reprinted by Dover, bound as one (very thick) volume. It does make for interesting reading! Now it gathers dust on my shelves next to another fabulous classic "The Theory of Sound", by Lord Raleigh (also two volumes bound as one by Dover), a great source for solutions of eigenvalue problems. Another huge volume by Dover is "The Scientific Papers of James Clerk Maxwell". These books are probably still available in one form or another. Jerry AI6L -Original Message- From: Kevin Rock [mailto:kev...@coho.net] Sent: Sunday, March 06, 2011 4:41 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Maxwell's Equations. I found the original, 1873 version of Maxwell's equations. The four space quaternion versions not the Gibbs - Heaviside mapping on to three space. Yes, something was lost in translation. Very interesting book. http://posner.library.cmu.edu/Posner/books/pages.cgi?call=537_M46T_1873_VOL. _1 and http://posner.library.cmu.edu/Posner/books/book.cgi?call=537_M46T_1873_VOL._ 2 An interesting winter's read. 73, 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
[Elecraft] Re: IC-7800
Looking at the QST review of the IC-7800, a couple of things leap out. The first is the keying waveform. It looks to me like this rig will have key clicks. ICOM will probably have the same attitude as Yaesu in cleaning up their act. Secondly, the transmit IMD is nothing to write home about. Third order only 23 dB down from a single tone, really marginal in my opinion. Especially for a $10,000 radio. I will stick with my K2, thank you. Jerry AI6L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
