Re: New coil woes cap concern

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>



You can't effectively use a simple multi-meter to test HV caps.  Most will
indicate ok but as HV is applied they can spark over internally above a
certain potential and breakdown.

You need to test leakage current at around 10 kV DC to see if they are ok.
I've posted a circuit with Terry in the archives to perform this test.  It
uses a 10-15 kV DC power source and a series of resistors to determine
leakage current thru neon bulbs.

Dr. Resonance
>
> I have two large caps that I hooked up to this coil (one at a time).They
> both test ok with a meter for capacitance. Neither test shorted as far as
I
> can tell.
> JIM
> -----"Tesla list" <tesla@xxxxxxxxxx> wrote: -----
>
> To: tesla@xxxxxxxxxx
> From: "Tesla list" <tesla@xxxxxxxxxx>
> Date: 05/09/2005 07:47PM
> Subject: RE: New coil woes
>
> Original poster: "Lau, Gary"
>
> How does a failing capacitor take out an NST?  Caps typically fail
> shorted, and an NST has no trouble with a short circuit load.
>
> Regards, Gary Lau
> MA, USA
>
>
>  > Original poster: jdwarshui@xxxxxxxxx
>
>
>
>  > A tank capacitor that is failing can easily take out an NST (check
>  > carefully)
>  >
>  > Jared Dwarshuis
>  >
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