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Admiral 30A12 restoration
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05-18-2013, 04:28 PM
bandersen
RCA 741PCS
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,808
Good eye. It's tied to the 6.3 VAC filament supply and I believe it creates a small negative bias for a few tubes. It's definitely on my list of many things to check
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