RE: Dialectrics in Plate Capacitors

• To: tesla-at-pupman-dot-com
• Subject: RE: Dialectrics in Plate Capacitors
• From: Apollo <ollopa-at-jps-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Mon, 20 Dec 1999 12:03:05 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

I've already got the materials for a stacked poly cap...
I think I'll try two in series and if I fry one or both, then
I'll go for the MMC.  How much does a typical .02uf MMC cost and
are there any places you'd recommend purchasing the capacitors 
from?  



> Original Poster: "Lau, Gary" <Gary.Lau-at-compaq-dot-com>

> The dielectric requirements all depend upon how large you want your arcs
> and
> how far you open up your gap.  I killed two rolled poly caps with a 15/60
> NST.  The first one used a single .08" dielectric, the second used two
> .04"
> dielectrics in series, both were in oil and the 2x.04" units were vacuum
> pumped prior to oil.  Both had 1.5" margins.  Do not try to economize with
> smaller margins.  High voltage will surface-track over far greater
> distances
> than an air breakdown, and I doubt silicone will adhere well enough to
> make
> a difference.

> Do yourself a favor and forget home-made poly caps, and build an MMC.

> Regards, Gary Lay
> Waltham, MA USA

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