Hi John, If it were me, I'd reseat the front panel assembly to the RF board. I had to do this many moons ago (like 8 years...) one time and it fixed the problem. The only guess I have for what's wrong is some minor corrosion on on some of the front panel pins.
John, I hope this does it for you. Can't think of anything else. 73! matt W6NIA On Fri, 2 Oct 2015 00:19:40 +0100, you wrote: >Greetings folks, >I'm puzzled. my 7 year old K3 did two strange things this evening. > >During a CW QSO on 21MHz, it appeared not to go back into receive and >required power off and on to operate. The QSO finished. > >Then, in the middle of a USB QSO on 5MHz - mid transmission, it went >back to receive and the PTT would not go back to TX, nor did the Vox work. > >I can operate the PTT on the back socket of the rig, and by grounding >pin 2 on the 8 pin mic connector. > >On measuring the pins 7 & 8, which should go to ground, these seem to be >floating and not grounded. > >I've just looked at the circuit and it shows these pins going to ground. > >Any suggestions? > >73 Matt Zilmer, W6NIA -- "Always store beer in a dark place." -R. Heinlein ______________________________________________________________ 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]
