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A little 'dirty' secret of the TV industry is that many early 'SS' sets had tube HV rectifiers in them. Tubes were cheaper, and some of the early SS HV diodes were quite failure prone...IIRC some SS sets into the early 80's still had HV rect tubes in them.
IIRC the early Quasars and the RCA 2000 had issues with the SS HV rectifiers, and Quasar actually switched back to tubes for a while to deal with it.
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