John,

I talked this over with B&C yesterday and checked the crowbar O/V device with a variable DC power supply and my Fluke meter. It consistently tripped at 15.8 to 16.0 volts. My system voltage was at 14.6-14.7 volts today while flying, so it has at least a 1 volt margin. I confirmed the system voltage reading (Garmin) with the Fluke meter and it is spot on.

I asked the guy at B&C if it would help to put a small capacitor across the O/V device. He didn't really have an answer. I am wondering if it could help to absorb and stabilizer any small voltage spikes.

If it is still having problems B&C wants me to change or swap the CB. If that doesn't work then they would send me a new O/V sensor.

Thanks for the input. This forum is really great with all of the experience out there.