Quote:
Originally Posted by Chris K
You are absolutely correct Kevin...only I have something hooked up backward!!! Full clockwise rotation of the brightness control is giving me 30v and full counterclockwise rotation, or what should be minimum voltage, is reading 230v DC! 
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Although that seems backwards it may actually be normal for these early RCA sets. There's a note on my 621 schematic saying counterclockwise is full brightness, but I don't see a similar note on the 721 schematic. In any event are you getting a raster now?