Re: Polycap

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Paul Marshall by way of Terry Fritz <twftesla-at-uswest-dot-net>" <klugmann-at-hotmail-dot-com>

Terry,

  Several years ago I made some poly plate caps. I made them from single 
.060" thick poly sheet. The plates were 11 x 8" and there are 48 of them in 
each cap. The capacitance is .026 uf. Everyone said that they would fail. 
They have been in service for 4 years. No failures. The break in time was 
only a 1 1/2 hours. 2300 v for 30 mins. and 7200 v for about 1 hours. Then I 
put them into service. They seen as much as 18 Kw. I believe they are 
practically bullet proof. The lids on the caps fit loosely. There is no 
explosion hazard. If I were you I'd build a plate cap.

Paul M.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Polycap
>Date: Tue, 23 Jan 2001 17:40:57 -0700
>
>Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" 
><Leik3-at-aol-dot-com>
>
>OK Everyone,
>Here's the deal: Before I signed up on this mailing list, I did a lot of
>research of the construction and a little of theory behind why it works and
>all that good stuff. I decided to construct a rolled poly cap and that 
>wasn't
>very fun. I made one that measures a little under .004mF (I think) and it's
>huge. Well, from everything I've heard on this list I'm about garunteed
>failure of this cap, probably sooner than later, and possibly even prone to
>explosion (something I'd like to avoid). I stumbled upon a page with the
>"party cup" cap and I was wondering if anyone has tried it with their coil.
>Would it stand up to the abuse or am I wasting my time with another bomb of 
>a
>cap. I know that the MMC is the best way to go, but I haven't quite talked 
>my
>wife into, "how it will benefit her" yet.
>Thanks all,
>Dennis
>
>
>

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