If you are under a certain age, you might not know the initialism VTVM. It stands for vacuum tube voltmeter....
voltmeter
If you work on old equipment, you know that there’s always that tense moment when you first plug it in...
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If you are under a certain age, you might not know the initialism VTVM. It stands for vacuum tube voltmeter....
If you work on old equipment, you know that there’s always that tense moment when you first plug it in...