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What have I got here, can anyone tell me?
Found inside a Rans S7.
Continuity between BNC jacket and antennae wand, and
Continuity between coax center wire and brass nut.
--
J. George Balmer 867- ...

Well I spent some time with the ammeter, with and without engine running. There appeared to be no overheating. There is less than an amp at the instrument buss. There is less than 4 amps overall at ...

Thanks Bruce...(will do this tomorrow - child-minding today).
I have a trend ammeter beside voltmeter....it shows nothing alarming but it might not reflect instrument situation.
The instruments are ...

Thanks so far to those with advice!

It was frustrating to watch the engine gauges overheat and melt while watching 14.2 Volts show on multimeter at gauge. Right now, I turn master on and all gauge ...

IRA

Thanks for reply....gauges are lit, but I kept the power and grounds for them completely separate so I could eliminate them if problems developed. (I hate cabin lighting in a VFR ship.) Tomorr ...

Just an update ...thanks to those who answered;

I have performed no modifications except annual inspection and wash.

The instruments burn up the resistor on the +ve supply into the circuit board ...

Interesting..

Can you see what in the instrument is fried? Is it a component connected
to the V+ or from the signal/sensor (or something else)?

The resistor on +ve Voltage into instrument bur ...

Well I'm stumped....my simple RV8, basic analog instruments only, Nipon Denso 40 amp Alternator, Oddeysey battery, worked well for 200 hours.

Saturday Volt Meter burned (resistor on circuit board o ...

Saturday was hot and busy flying kids for COPA fun event. After 3 hours I started to taxi back and smelled smoke. On examination my Van's voltmeter melted inside the electronics, on the circuit boar ...

All was well Saturday after 3 hours of flying my RV 8 for Kids Flying event, but on taxi back to hanger my Vans Voltmeter melted. Today I checked main bus (running) show 14.2 volts and (not running) ...