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Chad, I'm not sure, but my Uncle who used to be a serviceman, would always replace EVERY tube in the HV section when the flybacks went out, or if there was any high-voltage problem on those sets. Those 6JE6's are expensive suckers tho.... I guess he ran into problems if he left the tubes in, even if they tested good. IIRC it was the 6JE6, 6DW4,6BK4, 3A3, and 2AV2 that got replaced. ESPECIALLY on flyback failure.
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