Quote:
Originally Posted by Kevin Kuehn
.5uf @ 200v was a physically big cap back in 1948-49. My 20Z1 parts chassis has a Cornell Dubilier Grey Tiger in that posisiton, nothing special do you think? Rule of thumb - if it's overheating you need more surface area = higher voltage modern cap 
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I still maintain that it's an oil cap.
Consider the Zenith safety cap used in the 25FC58 or so. The original American Radionic cap. When I replaced them, I would take the hammer to them to see what caused them to fail. There was a oily film to the inside.
I never smashed the orange Spragues, as the were always good.