[Elecraft] Band-specific low output
I had a weird thing happen with my K3 this morning. I tried to check into a regional 75 meter net this morning and they couldn’t hear me. I looked at the display and had no power output deflection. I’m using the rear apron mic connection and I’ve had problems with it coming unplugged, but that wasn’t it. I looked at the meter on my external tuner and it showed a tiny bit of output so it wasn’t a mic issue. I moved up the band and changed to CW. I was set for 100 watts and I was showing 50. I changed to 40 and had the full 100 watts out. Moved back to 75 and then I had full output. Powered it off and back on…still good. Any ideas? __ 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] Tip: Front Panel Illumination Tip
Indeed, a nice light source depending on task, general night lighting for wee morning QSO, ahem - CW, sliver removal, soldering aid - vision assistance, etc. The one I utilize has the C-clamp style base that firmly attaches to the desk that you insert the lamp swivel pin into. Preferred, as the clamp style shown is a bit slippery for my liking, needs some open weave sandpaper for increased coefficient of friction on the desk. And, lights up the front panel on my K3s FB! 73, Roger VA1RST Halifax NS Sent from my iPhone > On Mar 7, 2024, at 8:43 AM, David Thompson via Elecraft > wrote: > > On 3/6/24 10:39 AM, Rick Tavan wrote: > >> Here is a small, LED, clip-on lamp that solved the problem for me: > > Morning Rick... > > Thanks for sharing your experience and the link. You're right about the front > panel of my K3 and it is not getting better as I age. :/ > > On a side note, I find a good desk lamp useful in front of the rig (and other > locations) as well. Particularly if I can arrange the light source such that > it does not shine in my eyes. > > The next question is: Is it radio quiet? > > 73 de AG7TX > > -- > David Thompson, AG7TX > __ > 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 burch.cr...@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
[Elecraft] Raspberry Pi4 & K4
I used to run FT8 on my Raspberry Pi and K3&soundcard. Any tips on using the K4 on FT-8 from a RPi4. (Shouldn’t need that sound card interface I needed on K3, right?) Thanks VA7MG __ 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, N1MM and DTR/RTS to send CW
Set PTT-KEY in Config to OFF - dtr and you will be back in business. 73, Roger VA1RST K3s # 11297 On Tue, Jun 20, 2023 at 8:47 PM Jim Brown wrote: > On 6/20/2023 1:56 PM, Bill Lederer wrote: > > Is the K3S different in this regard? > > Hi Bill, > > Don't know about the K3S, but the K4 certainly is. I suggest some RTFM. > :) BTW -- as usual, I'll be with W6JTI and W6GJB running 1A Battery and > signing W6BX. > > 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 burch.cr...@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
[Elecraft] K4 or K4D?
How can I tell if I have a K4 or a K4D K8RS - Roger Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows __ 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] KX2 For Sale - Fully Loaded
I'm selling my KX2. It's like new. I've only used it a few times on the picnic table in the back yard and a few times in the shack. It works great but I don't get around much any longer. It spends most of it's time in it's case on a shelf. It comes with the following: KX2 serial #99, KXAT2 tuner, KXIO2, two KXBT2 battery packs, KXBC2 charger, KXPD2 keyer paddle, ES60 padded case, MH3 hand microphone, AX1 Multi band whip antenna, AXE1 40M antenna extender for the AX1, AXB1 whip bipod, KX2GNDPLUG mini banana plug, BNCBP post adapter, BNCRA male-female right angle BNC, KX2ACBL KX2 accessory cable, a random wire and a ground wire with attached connector, and manuals. Sold as a set only. Asking $1250.- including shipping. USA only. Roger, W1EM __ 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] Advice on K3 versus KX3
Or you can just program a macro to do all that. On Sat, May 22, 2021 at 10:34 PM Bill Frantz wrote: > On 5/23/21 at 7:01 PM, jh3...@sumaq.jp (Keith Onishi) wrote: > > >Listening CW in crowded situation like contesting. K3 is much better > than KX3. > >Operating in digital mode, you can neither listen to receiving > >signals nor monitor your own transmitting audio with KX3. > > (No operating session is really complete without at least one > SSB, digital, and CW QSO.) > > I like digital modes and run both radios, the KX3 for portable > operations and the K3 for "in the shack". Switching between > digital and SSB on the KX3 is a PITA compared with the K3. On > the KX3 I have to: > >Unplug the microphone and plug in the computer sound card. >Turn off the mic bias. >Re-adjust the mic level. >Turn on the VOX. > > On the K3 I just have to turn on the VOX. All the cables stay in place. > > On the KX3, I monitor the RX audio with a spliter cable feeding > headphones and my computer. (I don't generally monitor TX audio > with headphones on either radio.) I do tune RTTY via the > monitored audio. > > 73 Bill AE6JV > > --- > Bill Frantz| Since the IBM Selectric, keyboards have gotten > 408-348-7900 | steadily worse. Now we have touchscreen keyboards. > www.pwpconsult.com | Can we make something even worse? > > __ > 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 ae4rm@gmail.com > -- Roger Meadows AE4RM __ 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] Funny K4 Story
Great story and wisdom moment Tom! 73, Roger VA1RST Sent from my iPhone > On May 16, 2021, at 11:04 AM, Tom Doligalski via Elecraft > wrote: > > Last week Monday I received K4 SN0110. The Brown Truck came at about 2 PM. > > That morning I had checked into an 80M net using my trusty K3. For 8)M is use > an inverted V. All was well. > > Monday afternoon was a frenzy of setting up and using the new K4. Pretty easy > setup. > > All week long I used the K4. All was good, but I was disappointed at signal > strengths on 80M. I kept thinking that the K4 just couldn’t receive well on > 80M! > > Yesterday I was out in the back doing yard work. That’s when I noticed that > the support ropes on BOTH ends of the 80M inverted V had failed, and the the > antenna was lying on the ground! > > We had had a storm come through here Monday mid-day, and my supposition is > that the support ropes had failed. I restored the support ropes, and low and > below the K4 works well on 80M again! > > I normally would have noticed the change in SWR, and realized that I had an > antenna problem. But, of course, I had tuned the K4 for the first time on 80M > when I received it! > > A learning moment (operator error?). Gonna try to check the antennas out a > bit more frequently! > > 73, Tom W4KX > __ > 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 burch.cr...@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] K4 Built-In Operating Manual updated (rev. B6)
Thanks Wayne! 73, Roger VA1RST Sent from my iPhone > On Jan 18, 2021, at 2:11 PM, Wayne Burdick wrote: > > As most of you know, the K4 has a built-in operating manual. You can browse > by subject, search for text, or tap the "LAST CTRL" button to get information > on the last knob, switch, or menu function used. > > This manual is also available for review on-line. Here's the updated link: > > > https://ftp.elecraft.com/K4/Manuals%20Downloads/K4%20Built-In%20Operating%20Manual,%20rev%20B6/K4BuiltInOperatingManualrevB6.html > > 73, > 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 burch.cr...@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] In answer to: "Has Anyone Received a K4?"
That’s great to hear Paul, thank you! How I remember the wait for K3 #75, but it was nothing like this!! 73, Roger VA1RST Sent from my iPhone > On Nov 20, 2020, at 9:55 PM, Paul Van Dyke wrote: > > I just got done writing a comment to the above question, and am ashamed.. > 20 minutes after I basically said "All I have heard is "Crickets" I got a > phone call from Watsonville, CA. I was one of the early ones and shortly > after Thanksgiving there will be a special package delivered. They are > still in lockdown, many many are working remotely .. add to it the spotty > parts due to Covid-19 ... and they just did a final major rewrite of the > coding ... > > Yes, I will annonce to the group when it comes in they ARE going out > the door.. > > Paul KB9AVO > __ > 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 burch.cr...@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
[Elecraft] S-meter reading at 100kHz
For those of you that have the KBPF3 100-400 kHz modification: What is your no-signal S meter reading at 100 kHz? Do you have the 220 Ufd polymer capacitor installed? Thanks, Roger __ 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] For Sale: K3/100 s/n 2578
I discovered that I had not upgraded to the KIOB3B card which provides a sound card and USB connection. I'm dropping the price to $2300 accordingly. Has virtually all options except VHF converters and KBPF3 on aux receiver. 6, 2.7 and 0.5 kHz filters in main RX; 2.7 and 0.5 hHz filters in aux RX. Went back to Mothership in Jul 2016 for TLC and upgrades. Please contact me directly with any questions: n...@roadrunner.com Asking $2500 plus shipping 73, Roger __ __ 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] KIOB3B for K3
Apparently this card is no longer available. Does anyone know what the price was? 73, Roger __ 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] For Sale: K3/100 s/n 2578
Has virtually all options except VHF converters and KBPF3 on aux receiver. 6, 2.7 and 0.5 kHz filters in main RX; 2.7 and 0.5 hHz filters in aux RX. Went back to Mothership in Jul 2016 for TLC and upgrades. Please contact me directly with any questions: n...@roadrunner.com Asking $2500 plus shipping 73, Roger __ 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] Matching resonant antennas
I first meet Walt and his sons at Dayton about 10 years before his death. Walt and his sons were/are some of the finest gentlemen that you could ever meet. Walt was the type of person who was friends with everyone he meet. It was a great loss to mankind and amateur radio when he became a Silent Key. Roger Steyaert K7RXV On 7/18/2020 2:54 PM, Lyn Norstad wrote: M. Walter Maxwell, W2DU (SK) passed away in 2012 at the age of 93. He was still active. ARRL has a brief bio here: http://www.arrl.org/news/walt-maxwell-w2du-sk-wrote-reflections 73 Lyn, W0LEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Lyn Norstad Sent: Saturday, July 18, 2020 1:10 PM To: 'Ted Roycraft'; 'Elecraft List Server' Subject: Re: [Elecraft] Matching resonant antennas The 428 page "Reflections III" from 2010 is available here in PDF format: http://www.w3pga.org/Antenna%20Books/Reflections%20III.pdf 73 Lyn, W0LEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ted Roycraft Sent: Saturday, July 18, 2020 10:22 AM To: Elecraft List Server Subject: Re: [Elecraft] Matching resonant antennas Walter Maxwell’s interesting book, “Reflections”, has an in-depth discussion on non-resonant antennas and tuners. Highly recommended. 73, Ted, W2ZK On Sat, Jul 18, 2020 at 10:05 AM Lyn Norstad wrote: Exactly. -Original Message- From: W2xj [mailto:w...@w2xj.net] Sent: Saturday, July 18, 2020 7:37 AM To: l...@lnainc.com Cc: barrylaz...@gmail.com; elecraft@mailman.qth.net Subject: Re: [Elecraft] Matching resonant antennas What is changing is the radiation pattern. As the frequency increases the pattern becomes more sidelobes. Some of those sidelobes are bigger than the main lobe and they radiate ‘somewhere’. Sent from my iPhone On Jul 17, 2020, at 21:19, Lyn Norstad wrote: Barry - +1 I use nothing but 600 ohm OWL (True Ladder Line) and a short piece of coax connects to a 1:1 / 4:1 hybrid balun to allow matching the impedance perfectly with my KAT500. The antenna is a 360' center fed EDZ (design frequency of 3.5 MHz). The KAT500 matches it on all bands 160 - 6m (on 15m, it bypasses). The measured performance indicates excellent radiation on all bands. 73 Lyn, W0LEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto: elecraft-boun...@mailman.qth.net] On Behalf Of Barry LaZar Sent: Friday, July 17, 2020 7:44 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Matching resonant antennas Wes, You're correct that open wire/ladder line transmission lines are not a panacea. But, in the average ham stations, open wire does overcome high losses with high SWR, or not so high SWR. What is needed is a look at the ARRL Antenna book for transmission line loss/100 ft. as a function of SWR. You see that on 10 meters running 10:1 SWR the total loss is around 1 db. And, as you go to the lower bands, losses become less. Typical 400 Ohm ladder line has a loss of 0.2 db at 10 MHz and 0.6 db at 100 MHz. Using these data and a little interpolation, I would use 0.4 db on 10 meters and a 10:1 SWR for this to be 0.8 db of additional loss for a total of about 1.2 db. Yes, I do use a balun and recommend them so add another 0.5 db. Add another 0.5 db for a good tuner and we end up with a total of 2.2 db. on 10 meters and less on 20 and it decomposes to an academic exercise on 40 and down. Coax on 10 starts out with a higher loss/100 feet. I will use what I use here in K3NDM, Times LMR400. That represents 0.4 at 10 MHz. and 1.4 db at 100 MHz. That will yield about 1.2 db/100 ft on 10 meters. Add 0.25 db for a 2:1 SWR and 0.5 for tuner loss and you end up with about __ 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 ted.roycr...@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 l...@lnainc.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 l...@lnainc.com ___
Re: [Elecraft] K3 Audio Peaking Filter
Unfortunately, the APF is too narrow for 160m with all the lightning noise. As I recall, we've been promised wider selectivity choice(s) but nothing ever happened. 73, Roger On 6/22/2020 12:27 PM, John Gibson wrote: Each Sunday evening, I use my K3 #820 to try to check into Kevin’s 20m Elecraft CW net. Kevin in Oregon is almost 1900 miles from me in Michigan, and I succeed only because I have a modest tri-band beam antenna at 60 ft. Current propagation conditions make this especially challenging. Sometimes Kevin is so buried in noise that I find him only because I can recognize the rhythm of his sending. Last evening, conditions were poor. I tuned all around the net frequency and could hear nothing of Kevin. Then I turned on my K3's Audio Peaking Filter (APF), searched again, and found him, and he was loud! When I turned off the APF, he vanished. I did check into the net. My K3's APF made all the difference between hearing Kevin and not finding him. I am impressed that it worked so well. I thank Wayne N6KR for creating this feature for the K3. 73, John, no8v __ 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...@roadrunner.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] K3S with Remoterig RRC1258
Hi All We have good success using a K3/0 mini to control a remote K3. We would now like to extend the system and have the possibility to use a K3S as the control rig and/or a K3S as the remote rig. I have, despite numerous searches, been able to discover the radio control connectivity for the K3S to the RRC at the control end or from the RRC to the K3S at the remote end. I would be interested in hearing from anyone who has been successful in using a K3S at either end. 73 Roger - G4BVY __ 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] Self-fusing liquid electrical tape
A way for us no longer young people to drive ground rods is with a SDS construction hammer and a ground rod driving bit. that is what electricians use. I have a layer of shale about 2 feet deep where I live and it takes less that 10 minutes per 8 foot ground rod driven below the surface with this method. You can get the equipment to do this at most tool rental places if you don't have your own. The driver bit for the tool is less very inexpensive at stores such as Lowes. Roger K7RXV On 6/5/2020 4:50 PM, Don Wilhelm wrote: Mike, They are all 8 foot rods and were driven vertically with a fence post driver and then finished off with a sledge. I was 20 years younger at that time, I could not do it today. 3 or 4 rods in a day was all the shoulders could manage. Yes, we hit some small rocks, but they will split is hammered on enough. We did not encounter large rocks when digging the house foundation or the trenches for the ground source heat pump - so it is not too rocky where we are - fist sized at the largest. 73, Don W3FPR On 6/5/2020 4:20 PM, Mike Maloney wrote: Don, Are those all 8 ft ground rods driven vertical in ground without help from a rock drill? Lots of rock in your area? Mike AC5P __ 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 k7...@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] Self-fusing liquid electrical tape
I have 12 ground rods in the ring ground system around my house with the radios in one room inside. the ground rods are all tied to each other and the power ground. I agree the Cad welds can get expensive, that is why I high temperature silver soldered the wire and ground rods together. Not normal soft solder but the high strength, high temperature silver solder used in HVAC systems. This requires a acetylene torch to do the soldering with. this accomplishes the same thing that a CAD weld provides but with less cost if you have gas welding equipment available. What ever you do make sure the system will maintain very good connections over time or you are just giveng yourself a false sense of security that can be very costly both in money and safety over time. Roger K7RXV On 6/5/2020 4:20 PM, Mike Maloney wrote: Don, Are those all 8 ft ground rods driven vertical in ground without help from a rock drill? Lots of rock in your area? Mike AC5P On Friday, June 5, 2020, 03:10:11 PM CDT, W2xj wrote: To my mind, false economy. Sent from my iPad On Jun 5, 2020, at 3:36 PM, Don Wilhelm wrote: That is why I used the mechanical clamps. I have 10 ground rods for a perimeter ground wire around the house, 6 on the perimeter ground around the workshop building (where the antenna feedlines first enter) and another 4 in the antenna field. A total of 20 Cad Welds would have exceeded my budget - the #4 copper wire was expensive enough! All the clamps are above ground a bit, so I can check the tightness with a wrench at least once a year. In most cases, the perimeter wires are folded back on itself to fit into the clamp, so the wire is continuous rather than having cut ends. Yes, even the utility ground rod clamp is exposed. The building inspector frowned on it until I told him why and he allowed it because I do not (will not) mow grass near any of the ground rods. 73, Don W3FPR On 6/5/2020 2:55 PM, Bob McGraw K4TAX wrote: Just look at $11.00 per ground rod connection for Cad-Weld as compared to $1.98 for a mechanical clamp. Which do you think a ham will choose ? __ 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 w...@w2xj.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 a...@sbcglobal.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 k7...@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
[Elecraft] Remoting K3 and Expert 1.3 using RemoteRig RC1258
Hi All, I'd be interested to hear from anyone who has successfully remoted a K3/Expert 1.3 combination using a RemoteRig RC1258. We have successfully established a link to the remote K3 using a K3/0-mini and have full functionality on CW and SSB. We have also managed to integrate DXlog at the control station. Good news so far!! However, attempts to control the Expert 1.3 over the RC1258 COM1 channel have failed. Has anyone else successfully achieved this? TIA and 73 Roger - G4BVY __ 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: The Colpitts mystery
I was stationed with the Coast Guard in Kodiak, Alaska between Summer 1976 and Summer 1978. I flew up to Anchorage to take my Extra exam before an examiner. Probably sometime in 1977. 73, Roger On 4/29/2020 10:47 AM, Ted Roycraft wrote: I took the test for Extra administered by an FCC examiner, David Popkin, in NYC in 1964. So there were still FCC examiners then. Funny that I still remember David Popkin's name but I can't remember what I had for dinner last night. 73, Ted, W2ZK On 4/29/2020 12:27 AM, Jim Brown wrote: On 4/28/2020 4:16 PM, EricJ wrote: but some time in the mid-50s it was given over to volunteer hams. My memory is that it was a LOT later than that. I'd guess late '70s to early '80s. 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 ted.roycr...@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 n...@roadrunner.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 poor CW reported with N1MM+
I rather liked the old Russian tank radios. Whoop de whoop de whoop whoop de whoop. 73, Roger On 4/24/2020 9:40 AM, Carl Yaffey wrote: IMHO nothing beat the sound of CW from a Collins 32V3. Yeah, I’m old! 73 K8NU __ 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] Amp Failure, Efficiency
With a switchmode power supply, it would seem to be simple to provide one or more lower voltage outputs to keep efficiency up at lower powers (maintain same load Z). 73, Roger __ 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] Ameritron 240V inrush limiter: any benefit on a KPA500?
Life sometimes is not as easy as it seems at first glance... The heater inrush current topic is a topic by itself and more complex than what can be read and heard in most of the ham communities. There used to be a very good treatment of heater management at the BURLE tube company homepage. Whether the page is still alive or not I don´t know. If alive you can learn a lot about the Miller-Larson effect, correct soft start for heating etc. What is sure is that especially in the case of the TL-922 the heater inrush current is up to 10!! times the nominal value just like it is the case with a cold filament bulb. This value has been measured - the only valid way to make a technical statement anyway. EIMAC requires the inrush current to be limited to not more than 3 x nominal value therefore inrush current limiting is a good idea in case you want maximum tube life. Burned powerswitches as stated elsewhere in this forum are not uncommon with TL-922s without current inrush limiting. Another very important factor is heater voltage however this is another story. Not only the heater benefits from a smart soft start but also the high voltage powersupply - especially the diodes and after all the filter capacitor/s could go bad. It may work for a long time without soft start but it is no good engineering practice unless very "soft" transformers are used. This would be a disadvantage at least for the high voltage powersupply. But coming back to the original question: With switching mode powersupplies (as in the KPA500 and 1500 and most of the solid state amplifiers with ps included) usually no further measures are necessary or would help in that respect as most SMPS have soft start circuits included. Somebody requested more information on transformers and the magnetizing mechanism - a good source is the website of any transformer manufacturer. They usually have pretty good theoretical explanations of this and other interesting parameters relevant in the world of transformers. As with many things in ham radio the best thing is to perform measurements and decide based on the results rather than "feelings" or "I have heard from someone who have heard from someone" Roger, DL5RBW -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Victor Rosenthal Sent: Sunday, January 19, 2020 1:11 PM To: David Wilcox Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Ameritron 240V inrush limiter: any benefit on a KPA500? The simplest circuit, which I added to my TL922, is a relay operated from a DC supply with a capacitor across the coil. The circuit can be set up to provide from a fraction of a second to a much longer delay. When the relay is de-energized, a small resistance is inserted in series with the line to the plate and/or filament transformer. When the relay pulls in, the resistor is shorted out and the line is connected directly to the transformers. I set mine up for about half a second, mostly to increase the life of the amplifier's on-off switch, and also to provide a more gentle start-up for the tube filaments. It has a side benefit of preventing the "thump" which sometimes occurs. The cold resistance of the filaments is very, very low, and the inrush current can be very high. As K4TAX said, in a properly designed amplifier, the transformer itself limits the inrush current to the filaments and the initial charging current of the capacitors in the plate supply to a safe value for the tubes, rectifier diodes, and other components. But I have had to replace on-off switches in the similar SB220, which means finding the right switch or it looks ugly. And I believe that the life of the filament will be longer if it heats up more gradually. In the big WE transmitter I mentioned in my previous message, there was a five-step switch to turn on the filaments, and I was told to wait about a second between steps. It might be unnecessary, but it was just a few junkbox parts. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ __ 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 ro...@mulzer.de __ 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] Ameritron 240V inrush limiter: any benefit on a KPA500?
NO amplifier needs inrush protection - it is the POWERSUPPLY that needs it no matter how it is implemented. So the answer is not an easy "NO" or "YES" but a definite "it depends"! Roger, DL5RBW -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Macy monkeys Sent: Saturday, January 18, 2020 7:42 PM To: Ron Durie Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] Ameritron 240V inrush limiter: any benefit on a KPA500? Thanks, Ron! I understand NO, hi! John K7FD > On Jan 18, 2020, at 10:06 AM, Ron Durie wrote: > > NO. Solid state amps do not need inrush protection. 73's > > Ron WB4OOA > Elecraft K-Line > > > > __ > 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 > macymonk...@charter.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 ro...@mulzer.de __ 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] KPA1500 for sale
Unfortunately, illness forces me to sell my KPA1500 s/n 373. It has Temperature Sensor and Minimum Load mods installed. Works perfectly. There are so few of these for sale I don't know what a fair asking price would be. I'm thinking $5000. I'll probably also sell my K3. perhaps someone would like a package deal. 73, Roger __ 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 driving an Alpha 86
No problem with the ALPHA amplifiers - the switching voltage is approx. 24 V @ 350 mA. The K3S MOSFET switch will switch up to 200 V (absolute MAX.!) and several amperes. But to make sure connect a voltmeter to the PTT socket on the amp and measure the voltage then switch to current measurement and switch the amplifier to TX with the multimeter. If both readings (voltage and current) are within limits then you are absolutely safe! 73 Roger, DL5RBW -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of DC Sent: Saturday, December 07, 2019 6:28 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S driving an Alpha 86 I have used a K3 with an Alpha 76, 78 and 77DX. On 12/6/2019 8:08 PM, Bob McGraw K4TAX wrote: > Sorry Vic, I had a different manufacturer manual in front of me trying to assist another ham with his radio and amp connection. > > Bob, K4TAX > > > Sent from my iPhone > >> On Dec 6, 2019, at 9:45 PM, Victor Rosenthal 4X6GP 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 >> 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 > vetteresto...@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 ro...@mulzer.de __ 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] K-POD is sold
Thanks and Merry Christmas to all who replied. 73, Roger __ 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] K-POD for sale
Like new. I thought I would use it more but, with my operating style, it just sits there. $200 Plus shipping. 73, Roger N1RJ __ 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 Drive Levels and the SPE 1.3K-FA
I purchased one of these amps about two years ago. I expected it to require 50 to 60 watts of drive for full output but it only took half that. I was worried about screwing up and hitting it with 100 watts from the K3 and blowing the final transistor. I knew there was a pad on the input and I figured it would be fairly simple to increase the attenuation 2 db or so. I pulled the covers off the amp and discovered that there were 2 pads on the input! The first was TO-220 style resistors mounted to a chassis rail and the second was conventional wire-wound resistors mounted on the PA circuit board. Replacing the TO-220 resistors looked like it would involve quite a bit of disassembly and probably would void the warranty. Tack soldering some resistors on the second pad to increase the attenuation would be much easier and could be easily removed if it had to go back for service. Problem solved, right? Nope. I discovered that the amp senses drive power after the first pad. This meant the amp kept tripping off with overdrive warnings! I contacted the factory to see if there was an adjustment I could make and was told it would have to come back for "realignment"! I now have a KPA1500! 73, Roger __ 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's binaural pitch-mapping feature
I've tried several times to get this to work on my K3 without result. My K3 has no AFX Mode selection. 73, Roger On 10/21/2019 8:05 PM, Wayne Burdick wrote: The KX3, like the K3/K3S and KX2, has full stereo audio. But it has one special audio effects mode the others don't: binaural-audio pitch mapping. When pitch-mapping is in effect, stations lower in frequency are mapped lower in audio pitch, and higher-frequency signals are mapped higher in pitch. A station tuned to your nominal sidetone pitch would be in the middle. This creates an audio "stage," of sorts, where it's easy to pick out different "instruments." The overall effect is to reduce listening fatigue in contests or anytime a band is crowded. Headphones or dual external speakers are of course required to use PITCH and other binaural audio modes. To turn on pitch mapping, set MENU:AFX MD to PITCH. 73, 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 n...@roadrunner.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] Audio Hum in TX Data Mode
Good morning Conrad, do you have the possibility to check the signal on an SDR or spectrum analyzer with sufficient resolution. That might be helpful to determine the origin of the noise and hence countermeasures. 73/Roger, DL5RBW -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Conrad PA5Y Sent: Friday, September 27, 2019 11:27 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Audio Hum in TX Data Mode I put up a new 6m antenna mainly for EME and I was so looking forward to using my K3S. The RX is great, I run it in parallel with 2 other receivers and it works very well on EME. However try as I might I cannot get rid of some quite bad hum on the TX Audio. I am using USB and before you ask yes I have got a low impedance ground from the PC to the K3S although removing it makes absolutely no difference. What did make a difference was moving the radio away from sources of magnetic fields such as monitors. However I cannot get rid of it completely. It also increases or at least changes when I put my hands on the radio. I have a few other radios located nearby and close to a monitor, pc or PSU and they do not suffer from this at all. Is this a common problem, is it a bad ground in the audio path internally or magnetic coupling into an audio transformer? It is completely impractical for me to move my radios 10 feet from any magnetic fields. Short of wrapping the radio in mu metal I really do not seem to be able to fix this. Any ideas? I have read and understood and followed Jim K9YC's advice and this works perfectly for my other 3 radios. I am really at a loss. 73 Conrad PA5Y __ 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 ro...@mulzer.de __ 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] We Need More Power
I have seen this guy on QRZ.COM with all kinds of strange philosophies. No wonder he tries to challenge the average (100 W) and the above average (1 kW) hams this time. Unlike him probably most of us know the correlation between power and signal strength. It is simple physics. And for sure almost everyone also knows that if NOBODY else is calling a certain station the chances are good that even with a QRP signal you are being heard. Even more so if the operator on the other side is skilled and has good antennas. Normally if we all would approach the hobby with the QRP attitude very few would manage to make a contact. With QRP attitude I mean I have never heard a QRP station using a stack of monobanders. Usually the antenna approach is the same as the power approach - MINIMUM! Nothing wrong with it and I like to try QRP as well if a signal is strong and not too many are calling however with minimum efforts on both sides especially under poor conditions even without competition it is often impossible to establish the contact or even hear each other. After all it is for a good reason that broadcast stations were and still running high power. Yes it is possible to communicate around the world with low power if conditions are good, competition is low or nonexistent so what is new about it? Right - NOTHING! 6 dBs are 4 times the power and "Life is too short for QRP" - that is not new either but nevertheless a valid attitude too. 73/Roger, DL5RBW -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ignacy Sent: Friday, September 27, 2019 5:38 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] We Need More Power The correlations between passionate writing and useful content is close to zero if not negative. Due to poor conditions the bands are empty. What you could do with 5W and some wire a few years ago now requires a KW with a beam. Many hams especially in noisy neighborhoods with simple antennas have trouble making contacts and become discouraged. But they can hear a station with a KW and a beam, and they overjoy when they make a contact. The original poster has a foundational license in Australia with, I think, 10W limit. I remember the excitement of such stations when I was working them from a very good VY2 location on 40m, for their first NA contact. Ignacy, NO9E -- Sent from: http://elecraft.365791.n2.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 ro...@mulzer.de __ 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 issues - audio hiss
Deviating from the original topic but somehow related to the noise gate I thought this may be of general interest as at least one other K3S user observed the same thing – a HB9 station has the same phenomenon with his K3S (see below). Bob: I tried different microphones (MH4, SHURE 444, HEIL HC-5) with mic gain and compressor settings down to inacceptable and with all three of them I get the same effect. That is with PTT pressed and the microphone level other than “0” and the noise gate OFF on an SDR receiver I see a tx noise floor block according to the filter bandwidth. However at approx. 2,5 kHz I see a “needle” that reaches 17 dB above the ambient noise floor. If I turn on the noise gate the tx noise floor is suppressed and so is the needle. Speaking into the microphone in order to open the noise gate the needle is masked by the speech energy however in breaks and before the gate closes again the level drops to the ambient noise level and the needle becomes visible again. It is always there but just covered by the speech energy. That is what makes the modulation ringing on top and at the end of each word. Reducing the compression has no effect other than lowering the overall signal – the tone is still there. I even tried to lower the 2,4 kHz level in the TX EQ but it has no effect as the noise is right on 2,5 kHz. The only thing that would help I guess is a software notch filter in the DSP that eliminates this spur or artefact or best avoid it at all. Disconnecting the microphone doesn´t change anything either. As soon as the Mic Gain level is other than “0” the tone is there microphone connected or not. So it seems it is an artefact that´s created in the radio but absolutely no noise pickup from the microphone. I tried 4 different radios – legacy and SDR and none of them shows a single tone on top of the tx noise floor but a smooth and more or less straight top of the tx noise caused by ambient noise. If no SDR is on hand a local remote SDR will do. 73s Roger, DL5RBW From: Bob McGraw K4TAX [mailto:rmcg...@blomand.net] Sent: Monday, September 16, 2019 8:05 PM To: Roger Subject: Re: [Elecraft] K3S issues Roger: Radio wise, I set my K3S just as I normally use it for SSB QSO's. The mike is selected at FP.H and the mike is a Shure SM-58 dynamic mike. The MIC gain value is 35 and the CMP value is 15. When monitoring the radio using another receiver, I do hear some noise in the audio spectrum. This noise is displayed on the SDR receiver using HDSDR as being in the 1500 Hz to 2500 Hz range with a peak value about 2200 Hz. Setting the MIC gain value to 0, I find the noise goes away. Nothing observed or heard. The setting the MIC gain back to 35 but disconnecting the mike from the front panel and then keying the radio as before, there is no noise. My conclusion is that the mike is just picking up ambient sound in the room. The use of the Speech Processor does bring the noise level up as opposed to when the CMP is set to a value of 0. I normally run the CMP at a value of 15. My conclusion is there is nothing I can see or hear coming out of the radio, unless it it going into the radio via the connected microphone. The measurements show the level to be some -70 dB below 100 watts PEP. With 100 watts PEP being 50 dBm re 50 ohms, then - 70 dB below that is 0.1 watts. Now if your friend is seeing your 10M signal at -43 dBm or S-9 +30 dB, then a signal that is -70 dB down is still and S-2 signal of -115 dBm. In a quiet band condition, that could easily be heard. My measurement were with the noise gate set to OFF. 73 Bob, K4TAX On 9/16/2019 12:30 PM, Roger wrote: Hi Bob, it is strange with that noise as nobody ever told me but gave me unsolicited reports on the good audio which I believe is true when it comes to frequency response. The first time I encountered this problem is when F5VNE and I4LEC told me about it on 40 m SSB 4 weeks ago. We checked and rechecked and finally it appeared that it was gone and the TL-922 ´s fan was the noise source. Signals went down by that time and so I guess we came to a wrong conclusion. Then a week ago a local friend (1 mile away) immediately told me about this noise. As there was no QSB and the signals well over S9 I tried all the things I described including battery power to make sure the switching mode powersupply is not causing any trouble. No way I could get rid of the noise except cranking down the mic gain to the level where the audio became drastically weaker and the noise gate took care of it. As soon as the noise gate opened when talking the “ringing” could be heard in the background. However it is best heard with the noise gate disabled and just the PTT pushed. I wonder what you find out. 73s Roger, DL5RBW From: Bob McGraw K4TAX [mailto:rmcg...@blomand.net] Sent: Monday, September 16, 2019 3:16 PM To: Roger Subjec
[Elecraft] K2USA
I was never at Ft Monmouth...took my training at Ft Gordon. We had a small hamshack there not nearly as elaborate as k2USA. I almost blew up the building one night. My first experience firing a furnace using soft coal. 73, Roger __ 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] K3S issues
Good evening, 1. when I turned on the K3S tonight I noticed that the current display was jumping between 1,4 and 2,7 Amperes on idle. Never saw the rig doing it before. The actual current consumption didn´t change but the readout of the K3S only. That approx. +1,3 A also was noticed on transmit. Checking the circuit diagram I see a 0,005 ohm current sense resistor (R3). The voltage drop goes into a current sense monitor ((U6) and finally into a multi/demultiplexer (U6.1). As I already had a bad (=oscillating) op amp in the temperature readout circuit I wonder if bad luck struck twice and I got a bad current sensor or multi/demultiplexer? Now as the radio ran for a while and warmed up I don´t see the jump in the current display anymore. 2. not really an issue but maybe a software fix is possible the Noise Gate level is very much on the edge. With the handmicrophone and in particular with a desk microphone the mic gain level has to be set very carefully on the conservative side. That is the mic gain has to be set just at the point where the signal becomes a little bit weaker compared to the asymptotic setting where a maximum is reached and no increase possible anymore even though there is still headroom in the mic gain range (received on a remote SDR). However even with mic gain just set under the maximum permissible value and the Noise Gate level set to max (25) still an occasional popping can be heard by pushing and holding the ptt but no ambient noise. If the mic gain level is set to the permissible limit (ALC deflection) the noise gate doesnt work anymore and an high frequent noise is coming along with the signal. No it is not the fan of the powersupply as I ran the station on a convection cooled linear powersupply and everything else in the shack muted. I even switched off the fan in the K3S which I normally leave running on "1". The compressor setting has NO effect at all on the point where the Noise Gate releases. The question is whether it is possible to have the firmware changed for more headroom in setting the Noise Gate level as the range from 0 to 15 is almost useless. 73/Roger - DL5RBW __ 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 Solution to the efficiency problem?
I think I've discovered a fly in my ointment! The efficiency that the amp displays is based on it's determination of the output power. If the amp is looking into a higher Z load, the indicated power is greater than normal resulting in a higher efficiency reading. Oh well, back to the drawing board! 73, Roger On 8/31/2019 9:32 AM, Roger D Johnson wrote: It occurred to me that the KPA1500's built in tuner might be of some help. Here's my reasoning. If we decrease the drive power to lessen the output power but keep the same voltage, the amplifier wants to see a higher load impedance. Here are the results of some quick tests: Base line is the amp set for 1000 watts output and eff is 44% I the set the tuner so the amp "sees" a load of 60 Ohms (actually) 58 Ohms with the values of L and C available. Eff went up to 53%! I then set the tuner to present a 70 Ohm load (actually 68 Ohms). Eff went up to 59%! This was into a dummy load. I realize that, if you're using the tuner to match an antenna, this could be very complicated. If Elecraft could figure some way to give us a choice of voltages for differing power levels, this problem would go away. 73, Roger __ 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...@roadrunner.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] KPA1500 Solution to the efficiency problem?
It occurred to me that the KPA1500's built in tuner might be of some help. Here's my reasoning. If we decrease the drive power to lessen the output power but keep the same voltage, the amplifier wants to see a higher load impedance. Here are the results of some quick tests: Base line is the amp set for 1000 watts output and eff is 44% I the set the tuner so the amp "sees" a load of 60 Ohms (actually) 58 Ohms with the values of L and C available. Eff went up to 53%! I then set the tuner to present a 70 Ohm load (actually 68 Ohms). Eff went up to 59%! This was into a dummy load. I realize that, if you're using the tuner to match an antenna, this could be very complicated. If Elecraft could figure some way to give us a choice of voltages for differing power levels, this problem would go away. 73, Roger __ 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] KPA-1500 on digital modes
I just did a quick check: At 1500 watts eff is 56% and pwr diss is 1179 watts 1000 44 1273 500 30 1120 My Expert 1.3K-FA had 3 voltage levels: 48 volts for full power (1300 watts) 38 800 watts 32 450 I no longer have the amp so I can't check the eff at those voltages and power levels. 73, Roger On 8/29/2019 9:03 AM, Roger D Johnson wrote: It's interesting that the heat that has to be dissipated is pretty close to 1000 watts in all these scenarios! Running the amp at less than full power buys you nothing. 73, Roger __ 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] KPA-1500 on digital modes
It's interesting that the heat that has to be dissipated is pretty close to 1000 watts in all these scenarios! Running the amp at less than full power buys you nothing. 73, Roger On 8/29/2019 8:38 AM, Larry (K8UT) wrote: Pete, I don't run my amp at full legal limit on digital modes, but typically set the input power for about 1000 watts output. One of the interesting characteristics of the amp is increased efficiency as power increases. At 600 watts efficiency is only 38%, whereas at 1000 efficiency increases to 50% and at 1500 watts to 60%. (see screenshots) -larry (K8UT) -- Original Message -- From: "N4ZR" To: "Elecraft List" Sent: 2019-08-29 07:59:23 Subject: [Elecraft] KPA-1500 on digital modes Elecraft's published specs rate the KPA-1500 for 1500 watts output on all modes. In prepping for this weekend's contest, I've been running it at closer to 700 watts, because I've found that even just running on CW, with its much lower duty cycle, my amp reaches 70C quickly. I don't do that much digital contesting, though, so I'm wondering whether 1500 watts output is on digital modes is realistic or a recipe for trouble. -- 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>, now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. __ 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...@charter.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 n...@roadrunner.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] KPA-1500 Power Output Variation
I just did some experiments with my K3/KPA1500 combo into a dummy load. I used my LP-700 for power measurements. Drive from K3 was set to 30W (28 on K3 indication). I started at 35C with PO at 1362 watts. At 70C, the PO dropped to 1277 watts...about a 6% decrease. K3 output remained steady at 30W. What we need is someone with a separate tuner that can set up loads greater and lesser than 50 Ohms and with Xc and Xl components. We may find greater output with loads less than 50 Ohms and/or loads with Xl rather than Xc. This is one of the disadvantages of having a fixed output network. With the old AL-1200, I could just tune for max smoke and set the drive accordingly! 73, Roger On 8/24/2019 2:45 PM, Jim McCook wrote: I'm using my K-3 with the KPA-1500 and have a problem with extreme changes in power output with a given drive level on 40m CW. This happens to a lesser extent on other bands with different antennas. My 40m antenna is tuned to 7.025 where SWR is 1.1:1. On 7.000 it is 1.4:1 and at 7.050 it's 1.3:1. Within that range of frequencies the output _without_ the tuner at a given drive level (30w) varies from 1300w to well over 1700w. Using careful _tuner_ settings it's only slightly better. I have to reduce drive to 24 or 25w to get below 1500w, depending on the temperature of the amplifier (power output varies a lot with temperature changes). Higher temp = lower output. I have tried to compensate in the segments where output is excessive by using manual settings via the Utility. This has helped slightly, but still isn't adequate. I've resisted using ALC because of concern for generating distortion. Having to ride the drive level from the K-3 is a PIA, especially during contests. It seems to me a good answer would be to have higher input attenuation so drive requirement would be higher, maybe around 70+ watts. I'd expect changing drive level by the same number of watts (5 or 6) would not affect output as much. I'd also assume the power output would not vary nearly so much with a given drive level. Is this a possible solution? I've also understood that most transmitters (even the K-3) have cleaner output near highest rated output. Help! Jim W6YA __ 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...@roadrunner.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 AGC action in CW
Alright I understand. J By browsing the firmware archive I found a pretty old firmware version announcing an the implementation of an independent AGC system whenever “CW Decode“ is enabled. I enabled this function a while ago to see how good it is compared to human ears and brain and being lazy I let it enabled. So if you enable CW Decode the AGC will be locked to what is “slow” (with the default values). Disabling CW Decode the radio returns to the regular AGC system and works as in all other modes. Hope this helps someone else now or in the future…….. 73, Roger, DL5RBW From: Dave Sublette [mailto:k4to.d...@gmail.com] Sent: Friday, July 19, 2019 6:52 PM To: Roger Subject: Re: [Elecraft] K3S AGC action in CW No,no. You can't get off that easy. You must tell why the problem occurred and how it was solved. 😀 Dave K4TO On Fri, Jul 19, 2019, 12:47 PM Roger wrote: Please ignore - problem solved! 73/Roger - DL5RBW __ 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...@arrl.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] K3S AGC action in CW
Please ignore - problem solved! 73/Roger - DL5RBW __ 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 AGC action in CW
That was the first thing I did (including reading and rereading the manual) however changing the settings didn´t affect the AGC action in CW. The AGC settings are identical in all modes (default) therefore I would expect identical behavior in all modes. And in fact it does EXCEPT for CW. No matter whether AGC is set to fast or slow in CW it stays slow. 73/Roger - DL5RBW -Original Message- From: Ken K3IU [mailto:kenk...@cox.net] Sent: Friday, July 19, 2019 12:34 PM To: Roger; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S AGC action in CW There are numerous AGC adjustments available in the CONFIG menu. You can probably find something to suit you there. 73, Ken K3IU On 7/19/2019 4:14 AM, Roger wrote: > Hi, > > when operating the K3S in CW mode I found there is no difference in > switching between AGC-F(ast) and AGC-S(slow). It seems the "default" > setting is on slow and does not go to fast (compared to the decay > characteristic in SSB). > The manual explains that the AGC Fast/Slow response should also be > effective in CW. > > Can anyone confirm this behavior (or not)? > > Firmware version is 5.66 (actually supposed to be 5.67 with the > "label" of the previous version). > > 73/Roger - DL5RBW > > > __ > 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 > kenk...@cox.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
[Elecraft] K3S AGC action in CW
Hi, when operating the K3S in CW mode I found there is no difference in switching between AGC-F(ast) and AGC-S(slow). It seems the "default" setting is on slow and does not go to fast (compared to the decay characteristic in SSB). The manual explains that the AGC Fast/Slow response should also be effective in CW. Can anyone confirm this behavior (or not)? Firmware version is 5.66 (actually supposed to be 5.67 with the "label" of the previous version). 73/Roger - DL5RBW __ 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-F, P3-F, K3S/0 complete remote setup
This K3-F loaded with almost every option. P3-F plus options. Both main and 2nd rcvr updated with the S synthesizers. Email please. 73 Roger K7ERQ __ 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] Sending KX3 to Elecraft for repair from Canada
Brian, I used Canada Post to send my K3 #75 in for repair. Elecraft used USPS for return. Documents were marked “for repair”. No hassle, no brokerage fees, just return shipping fees. Tracked package online going and return. Worked just fine. All the best. 73, Roger VA1RST Halifax Sent from my iPhone > On Jun 28, 2019, at 1:02 PM, Richard Corfield > wrote: > > I used UPS and need to write up my experience. Your question will encourage > that! > > I found that UPS's Customs Forms generator produced a Sales Invoice even > though I asked it to produce a Temporary Export for Repair. So I crossed > out the Sales part and wrote in pen that this was a repair and will be > returned. > > My parcel has been received and neither Elecraft or UPS have informed me of > any charges. Though an email from US Border Control when I've just received > in response to my question talks about Bonds. I may have been lucky that > the HSS Code for radio transceivers is duty free as the bond is about duty > which does not apply (at least from friendly countries according to the US > Border Control web site) > > An impression I got is that nobody can predict, or will stand by a > prediction, about what Customs will do. UK Customs helpline advised me to > state "FOR REPAIR" on the outgoing forms and "BRITISH GOODS RETURNED AFTER > REPAIR" on the return (or something like that). In the end someone at UPS I > think it was said that putting "Export Reason: Repair" on their form should > do it. Elecraft note that they have experience of how to handle the return, > and I've included a copy of the radio's sales receipt as suggested so if > needed I can prove that UK VAT has been paid already when it comes to > re-importing it. > > So I've been successful. I can say that what I did was quite simple in the > end, but I only _think_ I understand the procedure. > > - Richard > > > On Fri, 28 Jun 2019 at 16:49, Brian “VE3BWP” Pietrzyk > wrote: > >> I’m hoping to hear from any Canadian HAMs who have successfully sent their >> radio (KX3 in my case) to Elecraft USA for repair and got it back with the >> least amount of brokerage hassles. >> >> Which carrier did you use? How did it go? >> >> I ask because I once had to send a Yaesu in for a warranty repair from >> near Toronto to California. Yaesu asked I use Fedex and it was a nightmare. >> Hoping to avoid that again. >> >> Thanks, >> >> Brian ve3bwp. >> __ >> 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 richard.corfi...@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 burch.cr...@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] K4 pre-distortion?
-Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave Sent: Sunday, June 16, 2019 8:40 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K4 pre-distortion? In a word yes. Given that in order to match the RX performance of my existing K3/P3 (dual RX, K3S synths) it would require me to purchase the most expensive K4 version, then to me the only possible advantages over my K3 would be improved SSB TX IMD and improved RX DSP noise reduction. ---Any numbers out about TX IMD of the K4? The K3 noise reduction is very poor, I have never found it useful on SSB, and certainly not on CW. The K3 TX SSB 3rd/5th/7th/9th IMD products spread very wide and resemble a felled Christmas tree laid on its side. So a significant improvement in these areas is where the K4 needs to start. ---True - there are much better noise reduction algorithms around these days. The noiseblanker in the K3/K3S needs some revision too! TX IMD in the K3S (can´t speak of the K3) can be improved somewhat by increasing the bias however what is possible with a pair of RD100HHF final transistors @ 13,8 VDC is clearly demonstrated by the TS-590 and the new TS-890 by Kenwood (I am not a Kenwood promoter or fan but a clean signal promoter!). Even with increased bias the K3S is not as good Reading between the lines on both the Elecraft FAQs and this list, from the lack of an official mention of pre-distortion or improved TX IMD, I take it to mean the provision is a possible future upgrade and not included initially. Kinda like Icom including a frequency reference input socket on the IC9700 and buyers (incorrectly) assuming the IC9700 locks to an external reference (which it doesnt). --Amplifier manufacturers and radio manufacturers alike seem to have accepted that predistortion is the future however only ONE manufacturer so far has implemented it as soon as the algorithm became available for Ham Radio. Other than that it is easy and inexpensive to add an additional sampler in the output of an amplifier and/or an extra jack on a radio and label it RF SAMPLE OUTPUT/INPUT. For the moment it is more marketing than technical necessity 73 Roger, DL5RBW 73 Dave >On Sat, 15 Jun 2019 at 12:31, Michael >Walker wrote: > >Would having if be a deal breaker? > > > >Mike > > > >Sent from my iPad > > > -- Sent from my iPhone SE __ 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 ro...@mulzer.de __ 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 and NaP3 v5.6.0
This setup works fine except for 6m where the image rejection goes away. Larry, N8LP says the NaP3 program senses when the radio goes above 48 mHz and changes the I/Q setting to compensate. I've tried several versions of NaP3 and none of them do this on my setup. Am I missing something in the setup menu? I've found that changing the sign of the number in the GAIN box solves the problem but it's a bit of a pain to do this every time I want to check 6m. 73, Roger __ 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] K4/10
Will there be a K4 10 watt version offered? Roger VA1RST __ 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] Hara Arena Hit by Tornado
Hi Phil, Just checked the Seaside Convention Center website. A very nice looking expansion and renovation. I was last there in 2010 helping out in the Elecraft booth. Enjoy SeaPac. 73, Roger VA1RST/K7SJ On Tue, May 28, 2019 at 3:14 PM Phil Kane wrote: > On 5/28/2019 10:23 AM, Carl Jón Denbow wrote: > > > According to what I was told, the Greene County Fair Board has agreed > > to put in air conditioning in the three main buildings if the the > > Hamvention folks will sign a long-term contract. I think they want > > something like a ten-year deal. > > We get five year contracts for the SeaPac [ARRL Northwestern Division] > Convention at Seaside, OR. It will be very interesting because they are > enlarging the Convention Center and it is supposed to be "pretty much > done" for this year's convention this coming weekend! > > 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 __ 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] K4 and Predistortion
Going back to the original question as for now it seems there is no concrete information available on "predistortion" with the K4. Maybe further information will materialize over the next weeks/months which could be a valid platform for discussions. 73 Roger, DL5RBW -Original Message- From: W2xj [mailto:w...@w2xj.net] Sent: Sunday, May 19, 2019 11:56 AM To: Roger Cc: j...@audiosystemsgroup.com; elecraft@mailman.qth.net Subject: Re: [Elecraft] K4 and Predistortion With EER a class C or D amplifier can deliver an IMD of at least -80 DB but with pre-distortion it could be even better. Sent from my iPad > On May 19, 2019, at 3:38 AM, Roger wrote: > > As pointed out "PreEmphasis/DeEmphasis" and "PreDistortion" are two > different things. So it is important to keep this in mind. To describe > the process a little bit better it the introduction of "DeDistortion" > would help. While DeEmphasis was done at the receiver end DeDistortion > is done at the transmitter end by the amplifier. Just using one part > of Distortion (or > Emphasis) would really not reflect the true signal that is going into > the microphone. As any amplifier stage is adding distortion it is > appropriate to call the procedure done in the SDR (the ones that are > capable of) PreDistortion. The DeDistortion in the amplifier gives you > a much better approximation of a true linear amplification. Just > ADDING Predistortion and not adding or better SUBTRACTING the proper > amount of Dedistortion sure would make and leave the signal distorted. > > 3rd order IMD in the range of -60 dB and with careful design even more > is possible. > > Consider this: the best receiver doesnt help if a lot of average or > below average quality signals are around and splattering into your > "communication channel". The same is true if someone with a radio that > creates a lot of phase noise is next to you - your radio can have a > clean oscillator signal with low phase noise but still the other dirty > signal will go into the equation. > > So after it has been acknowledged that high phase noise oscillators > are a NO GO these days the next consequent step would be to clean up > the transmit signal in terms of intermodulation. > > If someone tuning a motorcycle or a car he better not only tunes the > engine for power but also adapt the brake system the chassis and > everything else affected to handle the more power. > > 73 Roger, DL5RBW > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown > Sent: Sunday, May 19, 2019 2:09 AM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K4 and Predistortion > >> On 5/18/2019 4:01 PM, Phil Kane wrote: >> Those >> of us with engineering backgrounds knew that what I was referring to >> as "pre-distortion" was the pre-emphasis / de-emphasis curves >> commonly used in FM broadcast audio chains. > > All of which emphasizes the need for using the right words to describe > things. The word "distortion" is most commonly used to describe > non-linearity, not frequency response. And, BTW, that > pre-emphasis/de-emphasis is a Standard, not just "commonly used." You > know the Regs far better than I, but I suspect it's there too. > > As I'm sure you know, it was also common practice to go FAR beyond > that, with multi-band dynamics processing and the tricky stuff that > Bob Orban was doing. The engineering "rule of thumb" was that if you > could see the modulation monitor needle move, you weren't doing > enough.:) > > I did some research on the Orban FM processor, which I published as an > AES Paper in 1986. http://k9yc.com/AESPaper-TDS.pdf > > 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 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 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] K4 and Predistortion
As pointed out "PreEmphasis/DeEmphasis" and "PreDistortion" are two different things. So it is important to keep this in mind. To describe the process a little bit better it the introduction of "DeDistortion" would help. While DeEmphasis was done at the receiver end DeDistortion is done at the transmitter end by the amplifier. Just using one part of Distortion (or Emphasis) would really not reflect the true signal that is going into the microphone. As any amplifier stage is adding distortion it is appropriate to call the procedure done in the SDR (the ones that are capable of) PreDistortion. The DeDistortion in the amplifier gives you a much better approximation of a true linear amplification. Just ADDING Predistortion and not adding or better SUBTRACTING the proper amount of Dedistortion sure would make and leave the signal distorted. 3rd order IMD in the range of -60 dB and with careful design even more is possible. Consider this: the best receiver doesn´t help if a lot of average or below average quality signals are around and splattering into your "communication channel". The same is true if someone with a radio that creates a lot of phase noise is next to you - your radio can have a clean oscillator signal with low phase noise but still the other dirty signal will go into the equation. So after it has been acknowledged that high phase noise oscillators are a NO GO these days the next consequent step would be to clean up the transmit signal in terms of intermodulation. If someone tuning a motorcycle or a car he better not only tunes the engine for power but also adapt the brake system the chassis and everything else affected to handle the more power. 73 Roger, DL5RBW -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown Sent: Sunday, May 19, 2019 2:09 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K4 and Predistortion On 5/18/2019 4:01 PM, Phil Kane wrote: > Those > of us with engineering backgrounds knew that what I was referring to > as "pre-distortion" was the pre-emphasis / de-emphasis curves commonly > used in FM broadcast audio chains. All of which emphasizes the need for using the right words to describe things. The word "distortion" is most commonly used to describe non-linearity, not frequency response. And, BTW, that pre-emphasis/de-emphasis is a Standard, not just "commonly used." You know the Regs far better than I, but I suspect it's there too. As I'm sure you know, it was also common practice to go FAR beyond that, with multi-band dynamics processing and the tricky stuff that Bob Orban was doing. The engineering "rule of thumb" was that if you could see the modulation monitor needle move, you weren't doing enough.:) I did some research on the Orban FM processor, which I published as an AES Paper in 1986. http://k9yc.com/AESPaper-TDS.pdf 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 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] FW: K4 and Predistortion
-Original Message- From: Roger [mailto:ro...@mulzer.de] Sent: Saturday, May 18, 2019 8:56 PM To: 'ab2tc' Subject: RE: [Elecraft] K4 and Predistortion Hi Knut, thanks for the info. I will check it out. Predistortion sure would place the K4 ahead of the majority of the manufacturers (at least the big ones). The tools and the possibilities are available for many years and have been for much longer in the professional sector. However I understand that most of the people don´t care about predistortion - maybe because they don´t really understand the benefit. It probably is a longer process like back in the 70s when car owners were afraid that emission cleaning causes engine problems and low power output. Actually it is funny that we are talking about unwanted emissions and power output here and there(don´t pull my leg - although being German I DON´T appreciate the VW emission case at all!) 73 Roger, DL5RBW -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of ab2tc Sent: Saturday, May 18, 2019 7:36 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K4 and Predistortion Hi Roger, You wrote "With the radios receiverwise reaching the physical limits it now is time to pull up the transmitter side to the state of the art as well. Regarding transmit IMD we are still in the 70s or 80s and sometimes even worse than that therefore no progress has been made the last 40 to 50 years!" I couldn't agree with you more ! BTW, there is now a new K4 group on groups.io, which is promising since the K3 group is now inundated with K4 stuff. AB2TC - Knut Roger-3 wrote > As there is a lot of buzz going around with the announced K4 and I > have seen > 1 or 2 messages on this reflector that referred to "Predistortion" I > wonder if there is any further detail on that. I probably fall out of > the regular scheme as I couldnt care less about the ability for remote > control and another 10 USB ports rather than predistortion. FLEX is > using the customer request for more remote control possibilities and > more USB ports to hold their 5 or 6 years ago announced predistortion > on standby - at least that is what they say. With the radios > receiverwise reaching the physical limits it now is time to pull up > the transmitter side to the state of the art as well. > Regarding transmit IMD we are still in the 70s or 80s and sometimes > even worse than that therefore no progress has been made the last 40 > to 50 years! > > So is there any deadline (vague or not) when predistortion will be > implemented? > > 73s Roger, DL5RBW > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto: > Elecraft@.qth > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html -- Sent from: http://elecraft.365791.n2.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 __ 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] For sale K3S, loaded with loaded P3
If you are interested, please email me and I will email copy of my original invoice from Elecraft for this MINT K3S full options & setup. Includes 144mhz option. Roger K7ERQ Sent from Roger Palmer i phone __ 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] K4 and Predistortion
As there is a lot of buzz going around with the announced K4 and I have seen 1 or 2 messages on this reflector that referred to "Predistortion" I wonder if there is any further detail on that. I probably fall out of the regular scheme as I couldn´t care less about the ability for remote control and another 10 USB ports rather than predistortion. FLEX is using the customer request for more remote control possibilities and more USB ports to hold their 5 or 6 years ago announced predistortion on standby - at least that is what they say. With the radios receiverwise reaching the physical limits it now is time to pull up the transmitter side to the state of the art as well. Regarding transmit IMD we are still in the 70s or 80s and sometimes even worse than that therefore no progress has been made the last 40 to 50 years! So is there any deadline (vague or not) when predistortion will be implemented? 73s Roger, DL5RBW __ 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] Clipping first element of CW - K3/KPA-1500
Hi Pete If you don't want to use VOX and/or QSK I take both the key line and the PTT line from the WinKey to the K3. In N1MM - Config - Config Ports etc - WinKey - Set lead time to 1. Works perfectly !! 73 Roger - G4BVY -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of N4ZR Sent: 24 April 2019 14:15 To: Elecraft List Subject: Re: [Elecraft] Clipping first element of CW - K3/KPA-1500 This appears to be, at least in part, a simple matter of RTFM. Also, my manual is 9 years old, and there's obviously been a lot of stuff added since then. Experimentally, it appears that must have *both* QSK on - whether Full or Semi - and VOX on. Once I do this, I see my first dots on the KPA-1500 bar-graph every time. I do not want to use the built-in keyer in the K3, because most of my operating is CW contesting, and I want to use the Winkeyer to send stored messages from N1MM +. The manual makes it clear (if only I'd read it) that both QSK and VOX must be enabled for CW. In PTT mode, it appears that my keyer is sending the PTT signal simultaneously with the first RF - not good. Thanks to everyone who helped put me on the right track. 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>, now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. On 4/24/2019 8:49 AM, Bob McGraw K4TAX wrote: > See CW QRO and TX DELAY in the menu. Also the benefits and likely > issues are described in the manual, page 58 and 66 as MENU items. > As to using other means to key the radio and amp and send CW, those > may have their own settings as required. > > While I do not consider myself a high speed CW op, I do work QSK. I > do not find any truncation of the first CW element.I use the > internal keyer and either a Vibroplex Iambic paddle or a Vibroplex > single level paddle. I have VOX set to ON, CW QRO is OFF and TX DLY > to NOR and 008. > > Hope this helps. > > 73 > > Bob, K4TAX > > > > > On 4/24/2019 7:34 AM, Andy Durbin wrote: >> "It occurs if the rising edge of the keying waveform happens at the >> same time as the PTT line. The ONLY way around this is to delay the >> keying waveform slightly so it occurs after the PTT." >> >> That would seem to imply that you are not using CW VOX keying. If >> that is the case then wouldn't using CW VOX eliminate the issue? >> >> 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 >> > > __ > 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 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 --- 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
[Elecraft] Clipping first element of CW - K3/KPA-1500
Hi Pete I had this problem as well - it is a "feature". It occurs if the rising edge of the keying waveform happens at the same time as the PTT line. The ONLY way around this is to delay the keying waveform slightly so it occurs after the PTT. If you are using a WinKey, then set the "lead-in" delay. There is also a feature in N1MM to achieve the same result. 73 Roger - G4BVY -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of N4ZR Sent: 23 April 2019 22:19 To: Elecraft List Subject: [Elecraft] Clipping first element of CW - K3/KPA-1500 Running into what I'm sure is a simple matter of menu settings, but... My K3 is set for PTT with a "normal" TX delay of 008 (I presume 8 ms.), driving a KPA-1500. I am getting persistent reports of clipping one dash worth at the beginning of each transmission, so my casll becomes "E4ZR", for example. I've been through both manuals, and aside from setting a higher TX Delay, I don't know what I can do to clean this up. so what am I missing? -- 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>, now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. __ 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 --- 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
Re: [Elecraft] P3 Display issues...
Sometimes it is even a loose connection - make sure you push the RJ-45 connector all the way in until it clicks. Sounds too stupid but happened to me once... 73 Roger, DL5RBW -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of oz6...@qsl.net Sent: Thursday, April 18, 2019 4:33 PM To: elecraft@mailman.qth.net Subject: [Elecraft] P3 Display issues... Hi - I just cannot get this to work for me. I am looking at my P3 connected to a K3. It is connected between the IF In on the P3 and IF Out on the K3. When looking at the P3 display, on all frequencies, I do not see the actual frequency of the VFO, I see 0, for example to top line has -25.0 0 +25.0. On top of that, when I use marker A and move it and press the QSY, nothing happens. What am I doing wrong. The User Guide just says how it should work, but not why it is displaying 0 as center frequency? Thanks, Robin OZ6ABM/5P5R __ 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 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] Measuring SWR (Long)
For an interesting discussion..."What happens to the power that's reflected?" On 4/9/2019 3:42 PM, Al Lorona wrote: There's always a lot of discussion about measuring SWR, low SWR values, SWR lights not lighting up, etc. Here's something that might give you a better 'feel' for SWR. Imagine that you measure your forward power at 100 W and your reflected power at only 1 W. You'd probably be very happy about this. Congratulations, your SWR would be 1.22 to 1. Pause for a moment and let it soak in that an SWR of 1.22 is fabulously good. Once you get to this point, below which we're dealing with reflected power that's less than 1% of your power, or four-hundredths of a dB, it's not worth doing any more to your antenna system to improve it. No trimming, cutting, raising, lowering, hanging stuff from it, adding remote tuned things, nothing. You're done for the day and can now get on the air! If the reflected power were 4 W, which would still look pretty small on the meter, the SWR would be 1.5 to 1. A lot of people might be bothered by an SWR of 1.5, but really this is still very good and it's probably not worth going back up to the antenna to mess with it any more. Most importantly, the station on the other end cannot possibly hear the difference between your 1.2 and 1.5. At this point you may be saying, "Yeah, but my rig/amplifier/other thing isn't happy unless the SWR is below 1.5 to 1, so I would still have to do more work." Okay, that's fine, but my point is that the absolute number 1.5 nonetheless represents a system that is working quite well. Let's allow the reflected power to increase all the way to 10 watts! At that point, your SWR would be about 2 to 1. Sounds pretty bad, but surely if you were stranded in the desert and had to use your KX3 and a wire to get help, you'd be happy to have a match this good. __ 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] New KPA1500 manual
When I was in the military, and a pub was changed, they just sent new pages that had the changes. That way they didn't have to re- publish the whole thing. Could Elecraft tell us which pages had been changed so we can print them out without doing the whole manual? 73, Roger __ 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] Purpose of this group
I have no interest in most of the technical discussions. Roger N1RJ On 3/24/2019 8:40 AM, Bill wrote: Am I correct that this is a technical group? Or, is posting space to be taken up by non-technical discussions of which many users have no interest? Bill W2BLC owner/user __ 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 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] OT: RTTY Nostalgia
I remember that from my Army days in the AN/GRC-26. No cat though! 73, Roger On 3/22/2019 12:26 PM, Ken G Kopp wrote: I had a Teletype Model 26 attached to a BC-610E. Cat slept on top for warmth. 73 ! 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
Re: [Elecraft] K3 PA Temp Reading Unstable
Check Q1 (MJE182) and U1B (LM6482). Most likely U1 is bad.. 73/Roger - DL5RBW __ 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] Account
Hello, I, Roger Muenker (DL2YDP) have cancelled my account at Elecraft, but still get emails from Elecraft. What do I have to do to stop receiving emails? Thank you for your reply. Best regards, Roger Münker DL2YDP __ 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] My email account
Hello, I, Roger Muenker (DL2YDP) have cancelled my account at Elecraft, but still get emails from Elecraft. What do I have to do to stop receiving emails? Thank you for your reply. Best regards, Roger Münker DL2YDP __ 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] FW: [Elecraft-K3] K3S Comparison table finalized (linkattached)
A comparison with TS-890S would be interesting. 73, Roger DL2YDP -- Sent from: http://elecraft.365791.n2.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 arch...@mail-archive.com
[Elecraft] P3 Panadapter - strong sum signals & relays clicking
Hello, since I worked on 80 and 160 m the last couple of weeks I noticed that the P3 panadapter starts clicking relays whenever a very strong local signal (-10 dBm to 0 dBm) or a number of strong signals within the bandpass are present. I could not find a relation yet when it happens because it takes place in irregular intervals. I don´t notice this behavior on the upper bands where signal levels and even the sum signals are not as strong as on the lowbands. I also don´t notice it if I switch to a nonresonant antenna and dropping the signal level or terminate the receiver to actually mute it. So it has to do with the signal level which makes me think it is an automatic adaption to keep the A/D converter in the dynamic range. It also seems to have a time constant as it doesn´t switch around quickly but keeps a certain state until it switches again. The fact that the noise floor on the screen jumps up by 50 dB or and then drops down again hints to an automatic adaption mode. Attenuator setting on the radio doesn´t have any effect. As I didn´t find any information about this issue in the manual I wonder whether somebody with a P3 panadapter could confirm (or not) whether he/she experiences the same thing. It was quite present this morning on 160 m (CQWW CW 160 m) as the band was filled with 9+++ signals between 1810 and 1900 kHz. I hear the sharp noise of the relays clicking thru the headphones and it gives an uncomfortable feeling to hear the relays cycling all the time. Maybe a future update of the firmware could make the switching process a bit smoother The firmware in use is the latest - ver. 1.60 73/Roger - DL5RBW __ 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] Query for new DSP features
What ever happened to giving us some alternate selectivity on the APF? 73, Roger __ 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 power amp 2SC2782
Examples of "14V" radios using RD100HHF1 final transistors and delivering good & stable results: ANAN 100,200 & 7000 series (w/o PureSignal) (3rd order IMD -30 dBc average (-36dB referred to one tone)); see AB4OJs test Kenwood TS 890S (3rd order IMD -32 dBc (-38 dB referred to one tone)) YAESU and ICOM are running the same transistors in some of their models. I am not promoting any brand but it is nothing "magic" or "bad" with MOSFETS being used at 14 V. Sure their advantage of having even better IMD characteristics at higher voltages cannot be used in a 14 V system. Roger/DL5RBW -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of ab2tc Sent: Sunday, January 06, 2019 1:42 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 power amp 2SC2782 Hi Wes, Agreed. In my view FETs are a mistake at the 14V level. The old K3 bipolar PA is much better (but still not good). Knut - AB2TC Wes Stewart-2 wrote > I have not observed a low power issue in my K3. OTOH, in my experience > the K3S PA has been a huge disappointment. One reason for buying a K3S > was a hope that the TX IMD would be improved with FETs. This would no > doubt have been true if Elecraft designed the radio for 50 VDC. > > Wes N7WS > > On 1/5/2019 3:16 PM, K9MA wrote: >> I've always felt that the KPA3 in my K3 was marginal. For example, >> I've never > -- Sent from: http://elecraft.365791.n2.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 ro...@mulzer.de __ 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] K3S/100-F for sale
K3-100 factory assembled Filter: FM(13kHz), AM(6kHz) and SSB(2,8kHz) TCXO 0,5ppm KTCX03-1 KDVR3 DIGITAL VOICE RECORDER KBPF3A GENERAL COVERAGE RX BAND-PASS FILTERS I ask for offers 73, Roger DL2YDP -- Sent from: http://elecraft.365791.n2.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 arch...@mail-archive.com
Re: [Elecraft] How to Isolate 2nd Transceiver in two Radio Base Station (WU6R / Mark)
Mark, it mainly depends on the "between port isolation" of the switch that you are going to use and the output power. There are some minor things to pay attention too like a poor quality (= poor shielded) interconnection cable. A 10 ft coax with poor shielding can pick up enough energy (especially under high power conditions) to put your receiver/s on risk. The higher the frequency and the higher the power you are running the higher will be the picked up power with all other variables constant. A typical laboratory grade switch will have an isolation of 100 dB or more. Thats how good the shielding of your cable has to be in order to take advantage of the switch´s isolation. A typical ham radio coax switch (DAIWA, Ameritron, MFJ, ALPHA Delta and alike) has about 60 dB at best and sometimes only 40 dB at 28 MHz. With one kilowatt on the port in use you have 100 mW (S 9+93!!) leaking thru to the unused ports. How much it is exactly depends on the length of the cable connected to the unused port and the termination (radio on or off etc.) If 2 radios to one antenna (or vice versa) is all you need then a two-way coax switch could provide some extra relief as you can terminate the unused port with 50 ohms and get another few dB of isolation. Multiport switches for 3,4,5 or more ports with isolation more than 80 dB are hard to get and EXPENSIVE! Roger/DL5RBW __ 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] WHY NOT 700HZ FILTER FOR K3/K3S?
I can vary the selectivity from 2800 to 50 Hz with the width knob. 73, Roger On 12/23/2018 10:08 AM, Bob McGraw K4TAX wrote: I find the 500 Hz 5 pole filter works very satisfactory for this purpose. 73 Bob, K4TAX On 12/23/2018 6:54 AM, Victor Rosenthal 4X6GP 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 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 n...@roadrunner.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] KPA-1500 issues
Interesting! I just ran some tests on my station into Bird load; tuner bypassed: At 50.1 mHz: LP-700 1.06 K3 1.5 KPA1500 1.0 At 9.56 mHz (geometric mean freq) LP-700 1.05 K3 1.1 KPA1500 1.0 At 1.825 mHz: LP-700 1.05 K3 1.1 KPA1500 1.0 My KPA1500 looks good but K3 is off on 6m. 73, Roger On 11/27/2018 5:22 PM, Wes Stewart wrote: A few months ago I wrote about the potential errors in measuring SWR with amateur grade equipment. See my comments in this thread: http://elecraft.365791.n2.nabble.com/K3-SWR-Numerical-Indication-td7643839.html I imagine "the best they can do" is accurate. Wes N7WS ps. I also said that if I was wrong, I was sure I would hear about it. Crickets. On 11/27/2018 12:39 PM, Paul Baldock wrote: [snip] I also note that when into a perfect 50 Ohms, and the tuner bypassed, on 6 meters, my KPA1500 says the SWR is 1.4:1. On 10 meters it reads 1.2:1. Rene from Elecraft says "this is the best they can do". Other than the issues above I am very happy with the KPA1500. - Paul __ 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...@roadrunner.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 Status Displayed on K3
The display of the K3 is "hard coded". When it was designed, there was no KPA1500 hence it can only read KPA500. 73, Roger On 10/26/2018 8:13 AM, Ed G wrote: I can’t think of a lower priority issue to have….so here is my question. I have the KPA1500 and K3 cabled together. Why do status changes on the amp (for example when I switch the amp to standby) show on the K3 screen as “KPA500” and not “KPA1500?” It looks like there is room on the K3 display for the missing digit, but maybe there is a display limitation? Amp firmware rev is 1.64. --Ed— Sent from Mail for Windows 10 --- 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 n...@roadrunner.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] AX1 Order Page Up but Broken?
Same problem here. Roger, W1EM I got a Tuesday 9Oct 506am EST email with a private order link for the AX1 antenna http://www.elecraft.com/elecraft_prod_list.htm No mention of AX1 antenna on the page. Needs a fix? Bret/N4SRN __ 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] KXPD2 For Sale
Just bought a new portable paddle and not using my KXPD2 anymore. Only used a few times in the field. Will sell for $95. Includes shipping within the CONUS via USPS. Contact romead...@icloud.com <mailto:romead...@icloud.com> for more info. 73, Roger __ 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 fixed!
I had to revert to WinXP in order to change the port assignment for the FTDI adapter. After I finally established comms, the firmware loaded and all seems fine now. Just wondering why I had the "low gain ratio" error with v1.78? 73 all, Roger __ 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] KPA1500
I think I've bricked my KPA1500! Yesterday I installed v1.78 of the firmware. Today I was calling a dx station on 20m and I kept getting a "low gain ratio" error message. I thought it might be the new firmware so decided to go back to v1.64. I downloaded the hex file from Elecraft and somewhere along the line things went astray. I had an firmware loading indication on the display but it was static. I looked through the manual for some sort of reset proceedure but found nothing. I thought that killing the power and a restart might cure it. Now, the amp comes on with fans at full blast and front panel buttons do nothing! Help! 73, Roger __ 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: WWV/WWVH Closure
Ah! LORAN C. I remember it well. Roger CWO4, USCG (retired) On 8/20/2018 12:54 PM, Rose wrote: Trivia .. The last I knew the WWVB transmitter is a "repurposed" 100KW LORAN C TX from the closed site in ND. 73! 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 arch...@mail-archive.com
[Elecraft] KPA1500
The amp arrived in fine shape and am getting familiar with all the features. I have some questions: Is there an input attenuator normally in-line? I can't figure out how to manually change the L and C values for the tuner. If these are changed, are the settings memorized? 73, Roger N1RJ __ 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] Survey and summary: Elecraft K3/K3S panadapter solutions
It's also fine with a reliable sound card! 73, Roger On 7/26/2018 6:33 PM, Joe Subich, W4TV wrote: The issue is that NaP3 does not support Airspy, SDRplay or RTS dongle based SDRs. It's fine if one has LP-Pan with an unreliable sound card or Fun Cube Dongle but otherwise it's rather crippled and not readily supported. 73, ... Joe, W4TV On 2018-07-26 5:28 PM, ab2tc wrote: Hi, None of you buddies have heard of LP-PAN and NaP3? No RF splitter needed and NaP3 takes care of all the frequency offsets caused by the bandpass shifting on the K3(S). The latest versions of NaP3 even have cluster spots displayed. AB2TC Knut William Liporace - WC2L wrote Great information!! The Airspy & N1MM+ Spectrum display is pretty cool. It is radio independent (K3, FTdx500, etc). The cost is $200. It is dead easy! My guess the Flex guys used the software included. So about 12% of the teams used the Airspy HF+. My guess is that you had most of them were using N1MM+. I would also like to know who was using what (radios, software, etc). I have not looked at the web site. If I remember someone did a list for WRTC 2014. I like the Win4K3 suite. For me the missing part is the ability to include the Airspy HF+. I don't use my P3... It will more than likely go back into the box. Will WC2L __ 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...@roadrunner.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] Which Amp ?
I have the report. 3rd order IMD ranges from approx 31 to 35db at 1000 watts output. Not terrible but not spectacular either. I really wish they had tested it at rated power (1300 watts). I might be very different at that point! 73, Roger On 7/24/2018 4:03 PM, Joe Subich, W4TV wrote: On the other hand, the SPE is no cleaner in Germany or Russia than it is in the US. SPE is one of the dirtiest amateur amplifiers ever submitted for FCC approval and the IMD tests were only performed at about 50% of maximum output power. 73, ... Joe, W4TV On 2018-07-24 12:51 PM, Oliver Dröse wrote: Bob is in Germany and Igor in Russia. They do not have the stupid FCC limits. ;-) 73, Olli - DH8BQA __ 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...@roadrunner.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] Which Amp ?
I'm using the SPE 1.3K-FA at present but have a KPA-1500 on order. I like the idea of automatically reducing the power out of the K3 to a preset value when the KPA-1500 is turned on. I also like the idea of having a bit more "headroom". The 1.3K has a 1db compression point of about 1300 watts although it will put out 1500 if it's pushed. If anyone is interested in a lightly used 1.3K let me know. It doesn't have a built in tuner but does have the newer more powerful transistor final. A good boost in power over a KPA-500 at half the cost of a KPA-1500. 73, Roger N1RJ __ 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] Ham Radio as a Side Dish
Ham-activated avocations Rebuilding the instrument cluster in a 1988 Ford Mustang for road racing. Two fasteners, two factory Ford plugs and presto...out comes the dash pod! Mega squirt air/spark/fuel engine management KIT, yes lots of soldering, same car now with a race built 347 stroker and a new engine harness for the new mass air meter, O2 sensor, 32# injectors. Connects to a laptop pc for on the go engine tuning. Also came with an engine simulator kit to test the final assembled board. This car competed in the Nevada Silver State Classic and on road course tracks in WA and OR. High speed electric model boats, hydros, sponson riggers, tunnel cats, mono hulls, Many scratch built, all needing servos, speed controllers and RC gear. These were raced competitively against others racers in the different classes at the local area racing ponds. These were all things my son and I did together. Who says hams don’t have other connected interests?! Life is full of adventures, what are some of your ham inspired activities?? And after almost 54 years of hamming, finally made it to Dayton the last two years! 73, Roger VA1RST, K7SJ, WA7BOC K2 755, K3 75 Sent from my iPhone > On May 26, 2018, at 8:45 PM, Dauer, Edward wrote: > > Like many others on the list, I survived decades as a pilot > (commercial-instrument, multi- and single- / former CFI / some noncompetitive > aerobatics / and a glider rating.) In fact, I discovered long ago that many > GA pilots are hams and vice - versa. More than one might expect. The > advantage of ham radio is that I don't need a medical certificate to keep > doing it (lost mine in 2011 after battling with the FAA for a series of > "specials"). It is also far less expensive; unlike owning airplanes, I never > had to convince the XYL that owning a transceiver was financially reasonable. > > A second connection is radio astronomy, along with the related subject of > SETI. Anyone know if Paul Allen was ever a ham? > > Ted, KN1CBR > > >-- > >Message: 3 >Date: Fri, 25 May 2018 21:29:11 -0700 >From: Wayne Burdick >To: Elecraft >Cc: KX3 >Subject: [Elecraft] Ham radio as a side dish >Message-ID: <46f5cdbf-cbef-4f55-b88e-789a9b592...@elecraft.com> >Content-Type: text/plain;charset=utf-8 > >Many of us combine our affinity for radio with other activities we?re > equally passionate about ? perhaps more. An obvious example (one that renders > this post marginally non-OT) is hiking / camping; for some of us, it?s a > natural environment for small radios and big ambitions. > >What are your ham-activated avocations? Do they come with as-yet-unsolved > problems in the field of radio ergonomics? > >Where is the boundary between communications media and the things you most > enjoy talking about? > >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 burch.cr...@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] KPA1500
What are users seeing for maximum power output on each band? 73, Roger N1RJ __ 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 spurs
I was watching 6m yesterday and noticed several spurs. They were spaced 39kHz apart. Amplitude dropped but didn't disappear when switched to dummy load. I have the K3 with new synthesizer boards. Just wondering if anyone else seeing something similar. IOW is it something in the K3 or external? 73, Roger __ 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] CW Splatter?
Thanks Don, I’m on a Pro Audio Engineering supply output is 13.5 key down at full output. Although not a be all tell all, I was monitoring RBN at the time to see where I was being heard and it was reporting my frequency correctly. THanks! Roger > On May 8, 2018, at 6:21 PM, Don Wilhelm wrote: > > Roger, > > Were you operating at home on a good power supply? Or were you on batteries > that may have become discharged below their limit? The supply voltage may be > a factor. > > A properly operating KX3 will not splatter, so the problem may be on the > receiving end. > Can you borrow a receiver or transceiver from a local ham, or take your KX3 > with the dummy load to his shack since yours is portable? > If you do that, make certain you do not overload the monitoring receiver. > Place a short wire antenna on the receiving end and adjust its distance to > the dummy load so the signal is S-9 or a bit less. > > If you do find a problem, email supp...@elecraft.com. > One thing I might suggest is to use the VFO B Alternate Displays to show the > voltage during transmit. If it drops substantially, that might be one > possible cause for that behavior. > > 73, > Don W3FPR > > On 5/8/2018 5:55 PM, Roger Meadows rmeadows0...@yahoo.com [KX3] wrote: >> I was informed via e-mail by a fellow ham that my CW signal from my KX3 was >> splattering about 11k. Although this is the only report I have even received >> like this, and may be an issue on the other side, it still does concern me. >> I do not have another radio where I could transmit into a dummy load and >> listen. __ 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] CW Splatter?
I was informed via e-mail by a fellow ham that my CW signal from my KX3 was splattering about 11k. Although this is the only report I have even received like this, and may be an issue on the other side, it still does concern me. I do not have another radio where I could transmit into a dummy load and listen. Has anyone seen this issue on a KX3? Anything I can check? Thanks and 73, Roger AE4RM __ 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] FT 8
Having a ball using my J-38 racking nice chatty QSO’s on 40 and 80 CW in the Novice Rig Roundup, Google it and come join the fun, all week long!! 73, Roger K7SJ/VE1 Nova Scotia Sent from my iPhone > On Mar 3, 2018, at 10:15 PM, Wes Stewart wrote: > > Well, he does live on the left coast in N. CA. ;-) > > Contrast that to one of his engineers who lives in Tucson. He drives a Tesla. > > Personally, I use all of my electrons powering my Elecraft gear and still > burn petrol* in my automobile. > > Wes N7WS > > * I drive an Australian-built Pontiac G8-GT. > >> On 3/3/2018 6:14 PM, Dave Cole (NK7Z) wrote: >> On 03/03/2018 05:09 PM, Wayne Burdick wrote: >> >> > Still, I wouldn’t want the self-driving model. >> > >> > Wayne >> >> ...and still you bought a Prius. :) >> >> >> 73s and thanks, >> Dave >> NK7Z >> https://www.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 burch.cr...@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
[Elecraft] Strange PX3 issue
Recently, my PX3 has started showing signals adjacent to the one I am listening to, both to the left and right. I went ahead and did the sideband nulling with no issues but the problem was still there. I then turned down the volume and found that the adjacent signals went aways. Raise the volume, they come back. Its like the PX3 is picking up something from the KX3. I did move the KX3 as far away from the PX3 as the cables would allow to no avail. Any ideas? Roger AE4RM __ 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] KX3 SWR Meter vs MFJ
I decided to do a spot check on SWR readings on my antenna with my KX3 after I tuned it with a MFJ 259C. The results were different between the two devices. The MFJ on the lower bands read a significantly higher SWR than the KX3. I guess my question is which would you trust, the MFJ or the KX3? The reading make a difference on how I will tune my antenna. Or do I need to get a third meter in the mix and go 2 out of 3? Sent from Yahoo Mail for 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] OK, odd question
IIRC there was no "standard". It was an arbitrary choice by the manufacturer which side of the filter they put the BFO crystal frequency. Nice to have a choice with the K3! 73, Roger On 2/14/2018 11:15 AM, Chuck Chandler wrote: Something that bugs me just a tiny wee bit. So, for years I used a Kenwood or two, then a Yaesu or three, then a Ten-Tec. Much of the time on CW. When I tuned a band, say 20M, I would start at the bottom of the band and tune upwards in frequency. When I did this, as I approached a CW signal it would be higher-pitched. As I tuned it to zero-beat with my 500-Hz CW offset the pitch would drop until it matched my 500 Hz spot. If I tuned too far, the pitch would drop below 500, then drop off the scale as I tuned past it. Similar in fashion to tuning a USB signal. My Elecraft tunes similar to one other rig I have owned, an iCom 706 MkIIG. As I tune up the band I first hear a low-pitched CW signal, then it centers, then it gets higher in pitch. Similar to tuning an LSB signal. This doesn't make a difference in usability, I guess it's due to the receiver architecture. And, yeah, I can go to "CW-R" and it works the way all those other radios did. My question is, is there a reason for it working this way? Does it provide some advantage? Or is it just the way it happened. like, not enough room towards the edge of the napkin when it was drawn up? Curious. 73 de Chuck, WS1L Chuck Chandler chandler...@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 n...@roadrunner.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] Old Software version
How do I load an older version back into the K3? 73, Roger __ 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] Selectivity
I noticed that during the contest, that if I selected 50 or 100 Hz selectivity, the audio would drop way down. It didn't used to be this way. I tried reloading an earlier version of the software but couldn't figure out how to do it. Hope this comes through, finally! 73, Roger __ 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 selectivity positions
__ 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] Selectivity
I noticed that during the contest, that if I selected 50 or 100 Hz selectivity, the audio would drop way down. It didn't used to be this way. I tried reloading an earlier version of the software but couldn't figure out how to do it. Hope this comes through, finally! 73, Roger __ 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] Selectivity
__ 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] Selectivity
__ 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 selectivity positions
__ 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
