Do you see the red TX light on? If so, you are in transmit and the monitor volume is too high. Perhaps something has closed your PTT circuit.

I could also suspect an RF Feedback problem. Give us more details about the state and conditions under which you observe this. Is it really frequency dependent?

73,
Don W3FPR

-.-. --.-N3TU -.-. --.- wrote:
Anyone have this problem with an open mic inside the radio? When I am on
52.795 mhz, I get a signal of s-3 and when I turn up the volume, it squeals.
I can actually speak through the bigger "grille" opening on top of the radio
and hear myself. I can't hear any weak signals on that frequency because it
is getting covered up. Any way to resolve this issue?
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