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Old 2nd Dec 2016, 3:42 pm   #40
G8HQP Dave
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Join Date: Sep 2008
Location: Solihull, West Midlands, UK.
Posts: 4,872
Default Re: 'THAT' Capacitor. What is it?

Quote:
Originally Posted by DKW F102
Is this the E.S.R I suppose ?
No. ESR is Equivalent Series Resistance, which is relevant for electrolytic capacitors and irrelevant (being virtually zero) for almost all other capacitors. ESR is irrelevant for a coupling capacitor even when an electrolytic is being used, unless the ESR is astonishingly high.

For coupling capacitors the resistance we are interested in is parallel to the capacitance, so in a sense the opposite of ESR. However, it is conceivable that some cheap capacitor testers could confuse leakage resistance with ESR, as they have the same effect on AC phase shift but for different reasons.

Quote:
I bought an E.S.R meter when I started geting my kit together but could not realy understand what it was supposed to be for, so have not used it since.
An ESR meter is for measuring ESR.
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