In article ,
"David" wrote:

I have never seen one where the dev just goes out of
adjustment.
Dave

and how many radio's have you seen in your lifetime?
I have been in Marine Elctronics better than 35 years
and have seen thousands......

Most cheapie Vhf radios use Cermet, of Electroset
mic elements, that don't switch polarities on there
own. Dev pots, however do change settings, just by
being hammered, when installed in planeing hulls
driven thru the water to fast. Yes, mic cords fail,
but very rarely do they fail, in other than a binary
mode.

Unless this fellow has a GRL License he shouldn't be
working on his radio in the first place. Replacing a
complete microphone with a plug attached is within
his preview, but opening up the case, by statute,
needs to be left to those who have the skills, and
License, required to do so. This a Marine Radio
after all.

Bruce in alaska
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add a 2 before @