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Re: Dead Capacitor
Subject: Re: Dead Capacitor
Date: Mon, 12 May 1997 14:00:55 -0400 (EDT)
From: Esondrmn-at-aol-dot-com
To: tesla-at-pupman-dot-com
In a message dated 97-05-11 09:55:54 EDT, you write:
-snip-
<<
I used two sheets of .030 HD Poly per side and rolled it up a
la
RQ's
instructions. I rather think this is not enough dielectric, as I am
using two
15 KV neons. Richard suggests as much.
In reading spec sheets from plastic manufacturers, and from
Sargeant and
Dollinger's book it appears decreasing the dielectric thickness by 4
doubles
the dielectric strength per mil. I shall try using 3 layers of .020
HDPE
, >>
LR,
I built two rolled poly caps made with one layer of .062 poly - and blew
both
of them. I am conviced that .062 poly is only good for 9 kv max in a
Tesla
coil tank circuit. I would think three layers of .030 poly should be
good up
close to 15 kv. I like the idea or rolling them with a thin layer of
paper
in between all the layers to help wick the oil in, but have not tried
it.
Ed Sonderman