This has been discussed before, but I have to share my frustration and fix. The last several days I've had unexpected intermittent rig and amp keying accompanied by a loud hum in my Heil Proset audio. It's happened both on CW and SSB while operating. If the K3 was re- started it sometimes showed an ERR KEY msg if the hum/keying was present.
Today I unplugged one cord after another. It quit when I pulled the last cord connection, the headset mic plug from the rear of the K3. Hmmmm? I opened the Heil boom mic case and found two wires touching (sometimes). Some small heat shrink tubing later it's fixed. Over time handling my Heil IC boom element had made a bad connection. The element takes bias voltage from the rig and a short at the mic was apparently the cause. I didn't determine the exact circuit flow that caused the keying and audio hum. Thanks Elecraft for the smart protection msg. 73, Gary NL7Y ______________________________________________________________ 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
