"Ron Natalie" wrote in message
m...

Sure. There's still a single point of failure on most singles. You may
have multiple radios, transponders, etc... but their all fed from the same
single electrical bus. A battery operated handheld (GPS or COM) has a
good chance of working, especially if you have spare batteries.

Back when I was using the hillbilly mechanics I had numerous failures of
the electrical system (due to their ineptitude at replacing the
regulator/OVP
unit).


Well, that's where I was going when I asked "what bizarre failure causes me
to lose both of my completely independent transceivers, and my transponder,
but leaves me fully confident
of the continued flawless operation of my other avionics?" An electrical
failure will affect all of your installed avionics, not just the
transceivers and transponder.