I have a '59 K35, very much upgraded with most of the latest toys, including a huge investment in modern avionics. I have three voltmeters on the panel (panel guage, JPI 730, and a Davtron).
Inflight, my voltage jumps all over the place, probably changing twice a second. I have a range from 13.9 to 15.1v as reported on all three, most of the time, the voltage cycling between 14.2-14.6v.
I've had two digital instruments die in the past year - my JPI700 died and was repl with a 730, and my horizon tach died and was serviced and replaced in the panel.
Question to you all - is your voltage as indicated - rock solid? My car's indicated voltage doesn't move and is steady. I am thinking my voltage regulator to be the culprit and am worried that this range in voltage is going to fry my mx20/gns480/autopilot etc, which are a crapload more $$$ to replace or service.
I'm planning to have the voltage regulator replaced - talked to my a&p who says it's buried in the nether regions of the panel and will require to take 1/2 the bird apart to get to.
Anybody have an opinion?