I wonder if your VCO is the cause.

Pete

wrote in message
...
Hi
I just got a Kenwood TKR-720 VHF Repeater
and it works great other than microphonics problem.
Does anyone know the fix for this?
If I tap on the outside cabinet you
hear it on the output when the repeater is keyed,etc.
Any help from Kenwood Gurus would be appreciated.
Rich NJ