[Elecraft] [K3]Err Ptt

[Holger Meinecke]

Hi elecrafters,

i have the following problem with k3 2121:

I'm using external ptt-in (backside of the K3).
At first rarely in qso the trx didn't go back to rx-mode after sending.
Usually a blind grip at the backside of the k3 into the cableing or an 
on /off cycle solved the problem (just moving at the ptt-cable or 
connector).
Right now it starts with err-ptt ( without any cableing but 12v ;O) ).
Resistance between ptt and ground is 25 ohms.

Someone had this problem (solved?) before?
I really don't trust this cinch-stuff

Any hints for further investigation ?

Regards from northern germany,
Holger DL6ABM