Kim: In the old days we used a 90 volt battery and a VTVM to check for
leakage. You would isolate the
cap and hook the battery and cap in series and watch the meter. A good cap
would show the inital
charge then drop towards zero volts. A bad cap would show almost the battery
voltage. Using just
an ohm meter would not give you a valid leakage reading. I have never had nor
used an ESR meter
but I think the above test would give similar results.
73 Clayton N4EV
Egad, I'm telling my age!
On Wednesday, July 9, 2014 11:00 PM, Kim Elmore <cw_de_n5op@sbcglobal.net>
wrote:
There has been discussion here about capacitor ESR in the past. I don't
have an ESR meter, but I removed and checked some of the suspect
capacitors. Can ESR be related to DC leakage? None of the ones I removed
appear to be leaky with a DC resistance on the order of a few megohms.
Does this equate to low ESR or is there no reliable relation save that
leaky capacitors are always bad?
Kim N5OP
--
Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)
/"In theory there is no difference between theory and practice. But, in
practice, there is." //-- Attributed to many people; it's so true that
it doesn't matter who said it./
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