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Old 07-08-2015, 07:26 PM
DaveWM DaveWM is offline
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Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
that tel ohm is the best! It may need caps itself but once working very nice.

The thing you need to test is leakage at rated voltage. Most old testers have an eye tube, IIRC the tel ohm uses a meter to show uA leakage.

They also test value (capacity). You have to be careful on low volt electros, as the test voltage may damage them, but for most vintage stuff its should be your go to tool.

I generally test the old cans and then compare to a new cap. If they test nearly the same, I assume the old is good to go and just hook it back up. Thats the one thing you need to do is remove it from the circuit, unlike modern ESR meters.

Post up a pic of the cap tester so I can see exactly what you have.
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