Antenna Connection Irregularities


I am not sure where to post this question.    I have K3s to KPA 1500 to remote antenna switches to various antennas.

Radio can be dead quiet, like not connected to an antenna.   I touch the key to transmit and the band comes alive.   I can wait a bit and it goes quiet again.   Touch the key and back alive.    As if there is a dirty contact somewhere on the antenna system (like a relay) that needs RF to make it work.

Any thoughts on where to look


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