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  #11  
Old 12-07-2021, 02:36 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
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Join Date: Jan 2011
Location: WI
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Quote:
Originally Posted by vortalexfan View Post
OK so I installed a NOS 6AQ5A tube into the audio output tube spot and I measured pins 1 and 7 (I looked at the RCA Receiving tube manual and saw that pins 1 and 7 are connected internally which is why nothing is connected to pin 7 of the tube socket) and it says on the Schematic that there should be 0V there and I'm measuring -5V there or so.

As for pins 5 and 6 I'm getting -22V there which doesn't quite make any sense unless like I said C50 and C51 were bad because before C50 I've got ~145-150V there and but then on the other side of C50 I have a negative voltage of well under 100V.
What is your reasoning about C50 and C51 that makes you think they could make pins 5 and 6 go negative? Can capacitors reverse the polarity of DC voltages?
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