Re: [Elecraft] K4 observation
Wait, it’s been determined that the K4 definitely has a pin one problem? Al W6LX/4 > On Jun 21, 2021, at 11:08 AM, David Gilbert wrote: > > > Does any of that mitigate the Pin 1 problem that K9YC keeps pointing out? At > first glance it doesn't appear to me that it would. > > Dave AB7E > > > >> On 6/18/2021 7:33 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 ab7e...@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 alor...@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 arch...@mail-archive.com
Re: [Elecraft] K4 observation
Does any of that mitigate the Pin 1 problem that K9YC keeps pointing out? At first glance it doesn't appear to me that it would. Dave AB7E On 6/18/2021 7:33 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 ab7e...@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
No difference with or without the microphone: of course, I never had an issue on CW in the first place! Tom W4KX From: Ray Sent: Saturday, June 19, 2021 2:50 PM To: Wayne Burdick; Tom Doligalski Cc: Elecraft Reflector; John Harper Subject: 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
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
Re: [Elecraft] K4 observation
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 arch...@mail-archive.com
Re: [Elecraft] K4 observation
John Would you put that under "Worked All Molars?" Paul KB9AVO On Fri, Jun 18, 2021, 10:35 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 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
Re: [Elecraft] K4 observation
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 arch...@mail-archive.com
Re: [Elecraft] K4 observation
Greaat! This is NOT a big deal to me… let me know if I can help… Tom W4KX From: Wayne Burdick Sent: Friday, June 18, 2021 6:09 PM To: Tom Doligalski Cc: j...@audiosystemsgroup.com; elecraft@mailman.qth.net Subject: Re: [Elecraft] K4 observation We’re testing a fix. W elecraft.com On Jun 18, 2021, at 2:21 PM, Tom Doligalski via Elecraft wrote: Interesting, and possibly related (and I kind of forgot till I read Jim’s email). 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. Headphones connected to the rear panel jack. Gonna get out the ferrites… Tom W4KX Sent from my iPad On Jun 18, 2021, at 2:07 PM, Jim Brown wrote: On 6/18/2021 3:58 AM, Tom Doligalski via Elecraft wrote: For years I used a Radiosport headset with my K3. Worked like a champ. Since I received my K4 I noticed annoying RFI-induced feedback on the Radiosport when operating SSB on the K4. Monitor is set to 0. I would blame that on the radio. Elecraft has a long history of Pin One Problems, which are a well known cause of RFI. I first alerted Wayne to this at least 15 years ago. Elecraft is not unique in the regard -- the last time I was at Dayton, several years ago, EVERY radio on display in booths that I was able to look at had obvious Pin One Problems. The following links were written nearly 20 years ago. Pro audio has mostly cleaned up its act. Ham radio is still in the dark ages. http://k9yc.com/Pin_1_Revisited.pdf http://k9yc.com/Pin_1_Revisited_Part_2.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 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 n...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K4 observation
We’re testing a fix. W elecraft.com > On Jun 18, 2021, at 2:21 PM, Tom Doligalski via Elecraft > wrote: > > Interesting, and possibly related (and I kind of forgot till I read Jim’s > email). > > 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. > > Headphones connected to the rear panel jack. > > Gonna get out the ferrites… > > Tom W4KX > > Sent from my iPad > >>> On Jun 18, 2021, at 2:07 PM, Jim Brown wrote: >>> >>> On 6/18/2021 3:58 AM, Tom Doligalski via Elecraft wrote: >>> For years I used a Radiosport headset with my K3. Worked like a champ. >>> Since I received my K4 I noticed annoying RFI-induced feedback on the >>> Radiosport when operating SSB on the K4. Monitor is set to 0. >> >> I would blame that on the radio. Elecraft has a long history of Pin One >> Problems, which are a well known cause of RFI. I first alerted Wayne to this >> at least 15 years ago. Elecraft is not unique in the regard -- the last time >> I was at Dayton, several years ago, EVERY radio on display in booths that I >> was able to look at had obvious Pin One Problems. The following links were >> written nearly 20 years ago. Pro audio has mostly cleaned up its act. Ham >> radio is still in the dark ages. >> >> http://k9yc.com/Pin_1_Revisited.pdf >> http://k9yc.com/Pin_1_Revisited_Part_2.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 >> 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 n...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K4 observation
Interesting, and possibly related (and I kind of forgot till I read Jim’s email). 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. Headphones connected to the rear panel jack. Gonna get out the ferrites… Tom W4KX Sent from my iPad > On Jun 18, 2021, at 2:07 PM, Jim Brown wrote: > > On 6/18/2021 3:58 AM, Tom Doligalski via Elecraft wrote: >> For years I used a Radiosport headset with my K3. Worked like a champ. Since >> I received my K4 I noticed annoying RFI-induced feedback on the Radiosport >> when operating SSB on the K4. Monitor is set to 0. > > I would blame that on the radio. Elecraft has a long history of Pin One > Problems, which are a well known cause of RFI. I first alerted Wayne to this > at least 15 years ago. Elecraft is not unique in the regard -- the last time > I was at Dayton, several years ago, EVERY radio on display in booths that I > was able to look at had obvious Pin One Problems. The following links were > written nearly 20 years ago. Pro audio has mostly cleaned up its act. Ham > radio is still in the dark ages. > > http://k9yc.com/Pin_1_Revisited.pdf > http://k9yc.com/Pin_1_Revisited_Part_2.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 > 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
On 6/18/2021 3:58 AM, Tom Doligalski via Elecraft wrote: For years I used a Radiosport headset with my K3. Worked like a champ. Since I received my K4 I noticed annoying RFI-induced feedback on the Radiosport when operating SSB on the K4. Monitor is set to 0. I would blame that on the radio. Elecraft has a long history of Pin One Problems, which are a well known cause of RFI. I first alerted Wayne to this at least 15 years ago. Elecraft is not unique in the regard -- the last time I was at Dayton, several years ago, EVERY radio on display in booths that I was able to look at had obvious Pin One Problems. The following links were written nearly 20 years ago. Pro audio has mostly cleaned up its act. Ham radio is still in the dark ages. http://k9yc.com/Pin_1_Revisited.pdf http://k9yc.com/Pin_1_Revisited_Part_2.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K4 observation
Tom, We'll try to duplicate and correct this. I'll get back to you. 73, Wayne N6KR > On Jun 18, 2021, at 3:58 AM, Tom Doligalski via Elecraft > wrote: > > For years I used a Radiosport headset with my K3. Worked like a champ. Since > I received my K4 I noticed annoying RFI-induced feedback on the Radiosport > when operating SSB on the K4. Monitor is set to 0. No trouble on the internal > speaker. > > I’m gonna try ferrites next. > > Surprised to see this on the K4 and not on the K3! > > 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 arch...@mail-archive.com
