Thanks for looking Jim!

I found a link for someone that sells components and requested to have
a relay shipped to me. I'll probably put that one in and keep the
other one for a backup, although I'd be surprised if this is a common
problem given the number of Cessna audio panels that are out there and
still working...

I am probably going to try and find another audio panel, with marker
beacons and the componentry to support another COM, so I can throw one
in some day. I'd love to bite the bullet and upgrade to a newer audio
panel, but that would require a rewire and would be quite expensive!
What I have in there now serves my purpose, when it all works!!! ;-)

Thanks again for all of the input! I will post an update on how things
go, once I've had a chance to replace the relay. As for the immediate
problem... it has not come back, since we fiddled with the current
relay, although, I've only got about 3 hours of flight time since.
None-the-less, I wasn't getting that much functionality out of it, when
it was intermittently working!

Best Regards,
Todd