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Old 03-17-2023, 05:39 PM
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bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,779
Well some of those readings are way off. I'd start by tracing out the 12CA5. Is pin 2 grounded accidentally? Pin 2 and 5 should be connected together so you should have gotten identical readings but you didn't?

Also check that the primary on the audio output transformer is good. That supplies the plate voltage to the 12CA5
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