Thread: Need help.
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Old 05-05-2017, 08:49 AM
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bandersen bandersen is offline
RCA 741PCS
  
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,106
Yes, it uses a stacked supply. You should have about 140 volts on the cathode (pin 1) of the 6AS5.
The contrast control which varies the gain of the video amp is tied to that point.
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