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Vacuum tube voltmeter vtvm by commercial trades inst


Article Sent By: brianheath@machine--tools.com (Brian Heath)
Brian Heath is presenting: Vacuum tube voltmeter vtvm by commercial trades inst
As far as operation, the unit does not seem to be very stable or accurate, so no high expectations here. The pots need to be cleaned and the capacitors checked and the unit recalibrated. There are a few marks on the meter face. They don’t look like scratches, so they may clean off. I haven’t attempted any cleaning other than dusting.
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