Quote:
Originally Posted by kf4rca
What is the polarity at the CRT? Are you looking at the schematic or a scope?
The CRT should be positive. Which means the driver tube input should be negative.
The output of the detector is usually negative, because it is transmitted that way. (Sync is peak power.)
Some of those detector circuits produce 5V of video.
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The output of the detector is positive on this set. The video is amplified once and then fed to the grid of the kinescope.