1966 Airline am/fm/phono with overheating filter caps

[legenbass77]

Originally Posted by rca2000

One thing to check--Make SURE--you have the caps wired right. I say this because a LOT of vintage SS stereo and amps which use PNP transistor topology, had POSITIVE ground--NOT negative. I would say a 66 model would fall into this category.


If this is not the problem...there may be some sort of "spike" getting to the caps. Perhaps a bit too much AC ripple getting to them. Leaky B+ diodes WILL cause this . After all--you have plenty of voltage margin on the caps--so it HAS to be something like that.

Thank you!!! Polarity is exactly what the problem was. I was thinking about the problem while I had the can in my hand, checking it once again and sure enough there is was, " Y common positive." One of those duh moments for sure, but she's running great now! Ran about 30 minutes with no problems. Now to tackle the turntable.