[Elecraft] Hum on TX audio w/ CM500 headset on KX3

[Jim Brown]

On 5/10/2020 5:45 PM, Frank O'Donnell wrote:
> I was mostly curious why the CM500's mic produced the hum, but the 
> handheld mic that came with the KX3 didn't. The CM500 has a quite long 
> cable, and I wondered if that could be part of the problem.

Any one or a combination of the various issues I noted. Your observation 
about your finger on the coax connector suggests bonding and/or adapters 
that aren't doing what you think they are.

73, Jim K9YC