Electronics > Repair
Heathkit Capacitor Tester IT-22 from 1965
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TimFox:
A VTVM of that era would have 11 megohm input resistance, close to a typical 10 megohm modern DMM.
wasedadoc:

--- Quote from: FIXITNOW2003 on May 17, 2024, 06:30:20 am ---AER you using a modern DMM to read these voltages ? the values in the manual would have be done with a much old style of test meter which would have loaded the circuit a little bit giving lower voltages , try using an old AVO 7 or similar test meter

--- End quote ---
Good analogue meters at that time were 20,000 Ohms/Volt. Even not so good ones were 10,000 Ohms/Volt. So drawing 50uA or 100uA respectively at full scale deflection. Those loadings in that circuit are totally insignificant.
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