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In Reply to: RE: 5y3 vs 5r4 posted by waltr on April 13, 2008 at 15:30:02
Walt,
You should be measuring the DC voltage with all tubes in place, including the rectifier. Without any rectifier, there should be only AC from the transformer. It's possible the 58v was present from the last turn-on, if the power supply does not "bleed" quickly.
Regards
Mike
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