Very useful, thank you Russell!


On Tue, Apr 30, 2013 at 7:47 PM, RussellMc <apptechnz@gmail.com> wrote:

> > Bought some large electrolytic capacitors online, they are likely fakes=
..
> > I'd like to figure out if the voltage rating is anywhere near correct
> > before I use them.
>
> This informative paper on electrolytic capacitor manufacture gives
> some insight into what may be useful. Not analytical/numeric.
> The attached graph is from there.
>
>
> http://jianghai-europe.com/wp-content/uploads/3-Jianghai-Europe-E-Cap-Vol=
tage-Proof-AAL-2012-10-30.pdf
>
> Using a large series resistor and progressively ramping (or stepping)
> voltage up from say 80% rated voltage to 110% rated voltage over
> several days may improve your outcomes.
>
> Doing that and then doing an increasing voltage sweep and observing
> current should give a fair idea where the "knee" is.
> Doing it with several of them shows if they are consistent.
>
>
>       Russell
>
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