On Jul 1, 6:34*pm, David Lesher wrote:
"Mike Noel" writes:
So running a grounding wire from the jack to the radio tray is not enough?

You want to isolate the jack from the panel ground.

--
A host is a host from coast to
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

He's right you know. Otherwise, small alternator induced voltage
drops in the airframe will show up in series
with the mic. You puny little wire won't change that picture.
Isolation washers are the answer!!

Should be on the phones too.

Bill Hale