Hi, Sounds a bit like RF getting into the mic line. Does it happen when running into a dummy load? I use a Koss headset like this with no problems.
Andrew G8BYB -----Original Message----- From: [email protected] <[email protected]> On Behalf Of N4ZR Sent: 23 August 2020 16:57 To: Elecraft List <[email protected]> Subject: [Elecraft] Rear Mike Jack Question Recently, I began trying to use the rear microphone jack on my K3 with my Yamaha boom mike, instead of using a stand-alone USB sound card and feeding the signal to the LIN IN jack. This worked fine for a couple of weeks, but today when I tried it, I got very loud white noise driving my radio and amp essentially to full scale. I have MIC SEL set to RPH BIAS, which has worked in the past. Any MIC gain setting over 7 drives the amp to full output. When I pull the mike plug out of the jack, the problem goes away. Have I inadvertently messed up another setting, or perhaps a failure in the mike? -- 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:[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]
