[Elecraft] Strange K3 microphone /PTT fault

[Matt Zilmer]

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