RF feedback on 20 mtr
I am getting a fair amount of audio feedback on ssb on 20 meters.
However, it changes with the mic I use.
When using the handheld mic , it's is barely present, but just barely noticeable.
When I use the Heil pro set unit, with a foot switch, it's horrible.
I am assuming the long lead to the footswitch is picking up the RF, compared to the hand mic.
And only on 20 meters.
All components of station are connected to a DC ground( single lead, not really a RF ground), am using Icom 7200 to Alpha vertical with 28-30 ft of coax.
So, where to start, work on microphone circuit or coax feeding antenna ( common mode problem?)????
Gandalf the White (miniature Schnauzer)
2014 Silverado 2500
2014 Coachmen Chaparral 25IKS