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 <[email protected]> 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:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
