Hi Keith,
As far as I know your Fluke 27 is average-based, not true RMS. Then the reading for square wave input will be higher than true RMS.
Albert
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I also wanted to make sure the CRT heater voltage was present- measured about 8 VAC RMS at pins 8 & 9 on P1704. A little high, but I guess that's OK.
Keith Ostertag
