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#5
12-19-2016, 09:23 AM
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The CR70 uses DC to power the CRT filament. DC and AC RMS are basically equivalent. So 6.3 VDC on a CRT filament is just fine. No, your DMM has a very high impedance and will not load the supply down like the filament will. You'll need to measure the voltage while it's connected to the CRT.
You meter might have a static charge built up on the plastic face. Try wiping it with an anti-static dryer sheet like "Bounce" 
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