Quote:
Originally Posted by Dubis7
I read that you can check electrolytics with a multimeter by reading resistance across them. If they spike once and go down to OL very quickly, they're good. If they retain value, they're bad.
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Absolutely 101% not true ....
The only infallible test for an electrolytic capacitor is to either see it work in it's circuit without it or it's other associated components getting hot , or to test it using a capacitor tester that tests it at the actual voltage it's gonna see when it's in use . A cap that won't break down at the tiny (less than 9 volts) voltage your meter applies to it for the test could very well break down at the 100 or so volts your 35Z5 is gonna feed it .
My personal policy is "take no prisoners
with electrolytics , if I'm gonna get a piece of vintage tube electronics running , the first thing I do is to replace them before the first power up .