On 30/05/2021 19:42, elecraft-requ...@mailman.qth.net wrote:
The problem could be solved with a toggle switch in the shack opening the PTT 
line, but not for remote.  Thus my question of whether it is possible to get
   RF from the K3 w/o activating PTT.

I wonder if the DIGOUT1 output of the ACC connector can be made to do what you want: drive a relay that interrupts the KEYOUT line.

Alternative (and perhaps more expensive): The KPOD has 3 outputs that can be switched using serial commands. If you try this, be aware that the documentation of the KPOD is (or was) wrong: tip is output3, not output1, and vice versa.

If you want to use this to drive a relay you probably want a PNP transistor as buffer.

73, Geert Jan PE1HZG
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