Re: New 4" coil: R.Hull and CSN, Secondary Varnish

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

Original poster: "S Gaeta by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sgtporky-at-prodigy-dot-net>

Hi Ken,

I suspect it is water because it clears up after the coil has been turned
off for a while.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, September 21, 2002 12:15 PM
Subject: Re: New 4" coil: R.Hull and CSN, Secondary Varnish


> Original poster: "Crow Leader by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<tesla-at-lists.symmetric-dot-net>
>
> This white coating that looks like condensation on the lexan may be some
> type of oxidation of the plastic itself due to corona or corona byproducs.
> I've noticed this white film in homemade polypropylene capacitors, and it
> only happens under AC usage. The caps I made were insert tab wound with
1mil
> Hercules "capacitor grade" polypropylene film and at voltages over 1kV at
> 60Hz. They were dry. The impregnated ones I made failed after the mineral
> oil dissolved the film.
>
> KEN
>
>