Ampeg with gas

[Andy Le Blanc]

I turned over a repair this morning, an Ampeg R-12-rt, It has an original speaker.
Nice to see, had coupling cap issues and a couple bad resistors.

When ever I turned it off it would pop and fart..... phththththt....

and it turned out to be a bad filter cap in the PS the last one in the string.
It ran fine, no hum or buzz, just the fart at turn off.

[Structo]

Interesting, how did you diagnose that cap being the faulty one?

[Andy Le Blanc]

I rigged up a new cap with clips to ground and an old probe.

be damned if I wasted any $ on time or parts, a repair, not a restoration.

The client can't invest in restoration, few can, the amp will still need a proper recap.

I knew the sound the amp was making, been thru enough P, O, S old gear.
Component failures sound/smell different, a cap discharge sounds like a cap
discharge, just had to find which, and I'd already been thru the coupling for V leak.