[Elecraft] Elecraft CW Net Announcement
Good Evening, The weather changed a few days ago. The cool, wet days became sunny and mild. That is due to change again. Sun with high temperatures and wind. I'm glad the forest is so wet because it will take a few more days for it to dry out. Luckily this blast of heat will end by Friday. Folks south of me are not so lucky. They are testing the electricity grid with their A/C units. Good thing it's a dry heat. Stay hydrated folks. Propagation seems unchanged. I would rather it was different. Nostradamus predicted a solar event for 2021; maybe his forecast will prevail. There are a number of schools of thought, but you only really know a cycle's activity level when it has passed. Please join us on (or near): 14050 kHz at 2200z Sunday (3 PM PDT Sunday) 7047 kHz at z Monday (5 PM PDT Sunday) 73, Kevin. KD5ONS - After the hummingbird incident last week this article seems timely. Without the sun to light her iridescence she appeared brown and gray. Steller's Jays in the shadows sometimes present as brown too. Sun brings both species to full resonance. https://www.quantamagazine.org/how-blue-animals-color-themselves-with-nanostructures-20210616/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.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] 12 meter CW, anyone?
When this pesky lightning gets out of my area, I'll see what's going up on 12 meters Paul KB9AVO On Sat, Jun 19, 2021, 6:29 PM Wayne Burdick wrote: > I'm hearing beacons on 28 MHz these days I haven't heard in a long time, > suggesting that 12 meters, a favorite of mine, is probably open as well. > It's an especially fun QRP CW/SSB band if anyone's around. > > I'd love to arrange a time in the afternoon, even daily, for like-minded > ops who want to casually dabble in this interesting band on CW (not just > FT8). Maybe 1 PM Pacific, 24.895? > > 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 pvandyke1...@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 behavior of K3 on FT8
Dear OM or YL: Today I did a successful POTA activation using my K3. I usually use a smaller, lower wattage rig, but decided recently to use the K3 portable. I've used the K3 for POTA activation three times before this week -- but all on SSB. Today, I used FT8. I first was on 20M and everything was quite normal. Then I switched to 30M, and I was hearing nothing and friend who I was texting who lives fairly close to the park wasn't seeing my CQs. I had the MODE set to DATA. The friend suggested I switch to USB mode, and lo and below I started seeing signals on my screen and completed several QSOs. I had used DATA mode on 20M and it worked FB. I also later used DATA mode on 40M. Why didn't DATA mode work on 30M? Is there some setting where I have to declare USB or LSB for each band separately for DATA mode? All of this seems very strange to me. I used my K3 before for data modes in the shack, and I don't recall this issue. Any suggestions would be greatly appreciated. -- 73 de Carl N8VZ -- 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] 12 meter CW, anyone?
I'm hearing beacons on 28 MHz these days I haven't heard in a long time, suggesting that 12 meters, a favorite of mine, is probably open as well. It's an especially fun QRP CW/SSB band if anyone's around. I'd love to arrange a time in the afternoon, even daily, for like-minded ops who want to casually dabble in this interesting band on CW (not just FT8). Maybe 1 PM Pacific, 24.895? 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 arch...@mail-archive.com
Re: [Elecraft] Heil Pro 7 headset with KX3 - RF feedback?
My hearing aids have blue tooth but require an interface to use it with my iphone. The interface is a wireless remote control for the hearing aids and came with a very small thing that plugs into audio sources via a mini-phone plug. That sends the sound via BT to the remote and on to my hearing aids. Haven't used it much but that might work better than a headset. I didn't note any latency. I have a K3, KX3, and new IC9700 which all provide ext audio. The issue for lengthy use is the remote rechargeable battery life is short (maybe two hours). Note to Jim: Yes I realize its audio feedback in the CM500. Have no problem using my Sony MVR-V600 headphones or my Bose noise-cancelling headset. Suggestion that I wear headphones without hearing aids does not work for me. Hearing loss is not just a factor of amplitude (I cannot hear tones above 4-KHz). Loss is >100 dB. My hearing aids provide 22 channel digital processing and I still need closed captioning watching TV. Digital modes are best for doing weak-signal ham radio as I can see the computer FB. Ed - KL7UW Message: 7 Date: Fri, 18 Jun 2021 12:04:25 -0700 From: Rick NK7I To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Heil Pro 7 headset with KX3 - RF feedback? Message-ID: <21dc0253-acd8-71a6-e9aa-4341a183c...@gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Slight topic change, apologies. Has anyone used rx audio via Bluetooth into their hearing aids? Any issues? I was hoping the K4 would have BT audio, but it doesn't.? So the next best option would be to send the sound card audio to BT in a computer, linked to the aids or headset...? I don't have my K4 yet, so it's a guess. 73, Rick NK7I On 6/18/2021 11:58 AM, Jim Brown wrote: On 6/18/2021 11:34 AM, Ed Cole wrote: I wear hearing aids and the CM500 immediately set up a loud howl the minute I put them on (even with not being plugged into the radio).? Apparently my hearing aid gain is so high the CM500 provided feedback to the hearing aid mics - I have two with my OTE (over the ear) hearing aids. That's acoustic interaction of the earphones with your aids, and depends on the placement of the mics in the aids. Mics for the aids are picking up their own amplified sound, because the acoustic space around the ear is modified by the presence of the earphones. In sound systems, we call that feedback. It makes sense that different headphones would interact differently with aids, depending on the construction of both. My XYL uses aids where the mics are outside the ear. She doesn't use headphones when she's wearing them. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K2 auto tuner
I have a friend who is looking for a auto tuner for a K2. He doesn't want to spend full price. Anyone have either a built one or a kit laying around? Email direct offline with info please. 73 de -- John Fritze Jr K2QY k...@arrl.org ENY Section Manager 401 261 4996 (cell) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [Elecraft-K4] Improved frequency accuracy with external reference
Good fix, thought something might be wrong with my 10mhz source. Will retest on the next beta. Thanks! ED / W2RF Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Wayne Burdick Sent: Saturday, June 19, 2021 3:22 PM To: Elecraft Reflector Subject: [Elecraft] [Elecraft-K4] Improved frequency accuracy with external reference For those using the K4 with an external reference: Ken Long (N0QO) alerted us to an offset of about 0.1 ppm when the K4 was externally locked. 0.1 ppm is about 5 Hz on 6 meters. We confirmed this using a GPS-locked 10 MHz reference, and corrected the error. Accuracy is now in the expected range of about +/- 1 Hz on all bands, 6 m included. This correction will be available in the next beta release. 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 e...@qrv.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] [Elecraft-K4] Improved frequency accuracy with external reference
For those using the K4 with an external reference: Ken Long (N0QO) alerted us to an offset of about 0.1 ppm when the K4 was externally locked. 0.1 ppm is about 5 Hz on 6 meters. We confirmed this using a GPS-locked 10 MHz reference, and corrected the error. Accuracy is now in the expected range of about +/- 1 Hz on all bands, 6 m included. This correction will be available in the next beta release. 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 arch...@mail-archive.com
Re: [Elecraft] K4 observation
I'm glad you beat me to this, Ray :) Wayne > On Jun 19, 2021, at 11:50 AM, Ray wrote: > > Did You Trying Transmitting in CW mode with the Mic disconnected ? > WA6VAB ray > > > From: Wayne Burdick > Sent: Saturday, June 19, 2021 11:41 AM > To: Tom Doligalski > Cc: Elecraft Reflector; John Harper > Subject: Re: [Elecraft] K4 observation > > > > On Jun 19, 2021, at 3:17 AM, Tom Doligalski wrote: > > > > Actually, it could be a radio station. I haven’t listened long enough to > > ascertain… > > > > Frankly, I don’t care! The bigger problem is the rfi when I transmit. > > Which *will* be fixed. > > Wayne > > > > > Tom W4KX > > > > Sent from my iPad > > > >> On Jun 18, 2021, at 11:10 PM, w2xj wrote: > >> > >> > >> Wayne > >> > >> I seriously doubt this is an RF issue. TV is all digital and has no > >> discrete audio carrier. TV RF interference would sound like white noise. > >> This sounds more like an audio ground loop of some sort. > >> > >> > >> > >> > >>> On June 18, 2021 10:33 PM Wayne Burdick wrote: > >>> > >>> > >>> John, > >>> > >>> If the K4 is *off*, then there's no active circuitry involved. However, > >>> the headphone plug-insertion detect circuit may involve an IC downstream > >>> that could include a schottky diode junction -- a potential way a very > >>> strong signal could be rectified right at the radio end of the cable. > >>> We're looking at that. > >>> > >>> If the cable is not very well shielded, and the TV station is *very > >>> strong*, I can imagine modern physics just barely covering this > >>> situation. It would help if the headphone cable was about the length of > >>> an end-fed dipole at the station's frequency. > >>> > >>> As for the K4 chassis itself: It's very well sealed (far better than the > >>> K3/K3S). > >>> > >>> Wayne > >>> N6KR > >>> > >>> > >>> > > On Jun 18, 2021, at 3:36 PM, John Harper wrote: > > https://www.youtube.com/watch?v=u1XRaNpgQDI > > John AE5X > https://ae5x.blogspot.com > > > Noticed that when the antenna are disconnected, and the K4 turned off, > > I hear a local TV station in the headphones… Never happened on the K3. > __ > >>> > >>> > >>> __ > >>> Elecraft mailing list > >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >>> Help: http://mailman.qth.net/mmfaq.htm > >>> Post: mailto:Elecraft@mailman.qth.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 w...@mac.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to wa6...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K4 observation
Did You Trying Transmitting in CW mode with the Mic disconnected ? WA6VAB ray From: Wayne Burdick Sent: Saturday, June 19, 2021 11:41 AM To: Tom Doligalski Cc: Elecraft Reflector; John Harper Subject: Re: [Elecraft] K4 observation > On Jun 19, 2021, at 3:17 AM, Tom Doligalski wrote: > > Actually, it could be a radio station. I haven’t listened long enough to > ascertain… > > Frankly, I don’t care! The bigger problem is the rfi when I transmit. Which *will* be fixed. Wayne > > Tom W4KX > > Sent from my iPad > >> On Jun 18, 2021, at 11:10 PM, w2xj wrote: >> >> >> Wayne >> >> I seriously doubt this is an RF issue. TV is all digital and has no discrete >> audio carrier. TV RF interference would sound like white noise. This sounds >> more like an audio ground loop of some sort. >> >> >> >> >>> On June 18, 2021 10:33 PM Wayne Burdick wrote: >>> >>> >>> John, >>> >>> If the K4 is *off*, then there's no active circuitry involved. However, the >>> headphone plug-insertion detect circuit may involve an IC downstream that >>> could include a schottky diode junction -- a potential way a very strong >>> signal could be rectified right at the radio end of the cable. We're >>> looking at that. >>> >>> If the cable is not very well shielded, and the TV station is *very >>> strong*, I can imagine modern physics just barely covering this situation. >>> It would help if the headphone cable was about the length of an end-fed >>> dipole at the station's frequency. >>> >>> As for the K4 chassis itself: It's very well sealed (far better than the >>> K3/K3S). >>> >>> Wayne >>> N6KR >>> >>> >>> > On Jun 18, 2021, at 3:36 PM, John Harper wrote: https://www.youtube.com/watch?v=u1XRaNpgQDI John AE5X https://ae5x.blogspot.com > Noticed that when the antenna are disconnected, and the K4 turned off, I > hear a local TV station in the headphones… Never happened on the K3. __ >>> >>> >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.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 w...@mac.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa6...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K4 observation
> On Jun 19, 2021, at 3:17 AM, Tom Doligalski wrote: > > Actually, it could be a radio station. I haven’t listened long enough to > ascertain… > > Frankly, I don’t care! The bigger problem is the rfi when I transmit. Which *will* be fixed. Wayne > > Tom W4KX > > Sent from my iPad > >> On Jun 18, 2021, at 11:10 PM, w2xj wrote: >> >> >> Wayne >> >> I seriously doubt this is an RF issue. TV is all digital and has no discrete >> audio carrier. TV RF interference would sound like white noise. This sounds >> more like an audio ground loop of some sort. >> >> >> >> >>> On June 18, 2021 10:33 PM Wayne Burdick wrote: >>> >>> >>> John, >>> >>> If the K4 is *off*, then there's no active circuitry involved. However, the >>> headphone plug-insertion detect circuit may involve an IC downstream that >>> could include a schottky diode junction -- a potential way a very strong >>> signal could be rectified right at the radio end of the cable. We're >>> looking at that. >>> >>> If the cable is not very well shielded, and the TV station is *very >>> strong*, I can imagine modern physics just barely covering this situation. >>> It would help if the headphone cable was about the length of an end-fed >>> dipole at the station's frequency. >>> >>> As for the K4 chassis itself: It's very well sealed (far better than the >>> K3/K3S). >>> >>> Wayne >>> N6KR >>> >>> >>> > On Jun 18, 2021, at 3:36 PM, John Harper wrote: https://www.youtube.com/watch?v=u1XRaNpgQDI John AE5X https://ae5x.blogspot.com > Noticed that when the antenna are disconnected, and the K4 turned off, I > hear a local TV station in the headphones… Never happened on the K3. __ >>> >>> >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.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 w...@mac.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K4 observation
Actually, it could be a radio station. I haven’t listened long enough to ascertain… Frankly, I don’t care! The bigger problem is the rfi when I transmit. Tom W4KX Sent from my iPad > On Jun 18, 2021, at 11:10 PM, w2xj wrote: > > > Wayne > > I seriously doubt this is an RF issue. TV is all digital and has no discrete > audio carrier. TV RF interference would sound like white noise. This sounds > more like an audio ground loop of some sort. > > > > >> On June 18, 2021 10:33 PM Wayne Burdick wrote: >> >> >> John, >> >> If the K4 is *off*, then there's no active circuitry involved. However, the >> headphone plug-insertion detect circuit may involve an IC downstream that >> could include a schottky diode junction -- a potential way a very strong >> signal could be rectified right at the radio end of the cable. We're looking >> at that. >> >> If the cable is not very well shielded, and the TV station is *very strong*, >> I can imagine modern physics just barely covering this situation. It would >> help if the headphone cable was about the length of an end-fed dipole at the >> station's frequency. >> >> As for the K4 chassis itself: It's very well sealed (far better than the >> K3/K3S). >> >> Wayne >> N6KR >> >> >> On Jun 18, 2021, at 3:36 PM, John Harper wrote: >>> >>> https://www.youtube.com/watch?v=u1XRaNpgQDI >>> >>> John AE5X >>> https://ae5x.blogspot.com >>> Noticed that when the antenna are disconnected, and the K4 turned off, I hear a local TV station in the headphones… Never happened on the K3. >>> __ >> >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.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 w...@mac.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
