I'm not sure??? It's a fairly generic looking intercom, and doesn't
have a model name or number on it???

I've owned the plane for 3 years now, and flew it with no radio
problems for the first 2 years. This problem just crept up 6, or so,
months back.

In the occurences where I'm able to fly for 45+ minutes, before the
radio fails, it works very well. I send and receive loud and clear,
and would have no indication of any problems whatsoever. That is what
has me leaning towards a connection issue (although I'm not sure if
heat is ruled out as an issue either???).

Thanks for the response! I'll take all the input I can get, because I
am at my wits-end and just want this nightmare to be over! The more
information I can take to the avionics shop, or to my mechanic, the
better!

Best Regards,
Todd