On 5/10/2020 8:49 PM, Jim Brown wrote:
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.
More obvious questions I should have asked -- Exactly what is your
antenna, including any counterpoise? How long is the coax? How far from
the shack? Is there a serious choke (per my cookbook) at the feedpoint?
Is it possible you have a bad piece of coax or a poorly installed
connector? Is your shack bonded? It should be, regardless of this problem.
73, Jim K9YC
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