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Old 12-20-2021, 11:25 PM
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bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,814
Very nice. I recall following your restoration progress.

I was a bit disappointed to discover those nifty CCC high voltage caps are actually old replacements. I snipped them out and tacked in replacements. That improved the raster quite a bit.

I also found that the main B+ rail was only about 75 volts. I tacked a 1N5408 diode across the selenium rectifier and that brought it right up. No noticeable improvement though. Loud buzz out of speaker and no hint of reception.

I'll continue to work my way through the power supply.
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Last edited by bandersen; 12-21-2021 at 07:49 PM.
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