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Re: New coil woes cap concern
- To: tesla@xxxxxxxxxx
- Subject: Re: New coil woes cap concern
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Tue, 10 May 2005 10:40:17 -0600
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- Resent-date: Tue, 10 May 2005 10:44:42 -0600 (MDT)
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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.
> 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
> can tell.
> -----"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