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A lot of those "micas" aren't really mica caps at all... Especially the reddish-brown ones in the RCA chasses. They're nothing but paper caps in a flat bakelite casing. I usually find the ones on the horizontal oscillator transformer way out of spec, along with the ones coupling the tuner output to the 1st IF, and the IF interstage coupling caps. Replace with true Mica caps, if you can find them.
Charles
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Collecting & restoring TVs in Los Angeles since age 10
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