Quote:
Originally Posted by Electronic M
Tubular ceramic caps usually are paper dielectric and are VERY high failure. Paper dielectric capacitors are not just paper/cardboard tubes they were sold in plastic shells (I see some in your pictures too), ceramic shells and metal shells....No matter the shell material paper dielectric capacitors are BAD and should be changed.
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This made me wonder as I had never seen a ceramic tubular fail, but then, my experience has been limited from 70s TVs until present.
I took this cap from my old TV stock:
...and cracked it open. What I found was that this capacitor is a foil and plastic film, not paper. This cap would have been factory installed from the 60s to the 80s in a transistor TV, so perhaps paper ceramic caps were gone by then.
But what the heck, caps are cheap enough and cheap insurance. Change all tubulars seems to be good advice on tube TVs. I suspect any ceramics in later transistor TVs are fine.
John