|
Faults like this are exactly why I tell people never to trust those supposed 'mica' caps. The people on ARF didn't believe me, but half the ones I removed from a Philco I restored were actually flat package PIO's! After finding a whole lot of them bad, I got curious and broke them apart, that's how I know what's inside. So they were no better than a black beauty, but there's no way to tell without destruction.
My take is that if these caps aren't in HV circuits (i.e. under a lot of stress), they will probably be OK. Example, I left the ones in the tuner of my VT-71 in place and they work fine. But none of the ones in the flyback circuit of the Philco were good, and some of the ones in oscillator circuits were causing the wrong frequencies to be generated. if in any doubt=replace.
__________________
Evolution...
|