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glass caps.
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From: Payne, Will E [SMTP:will.e.payne-at-lmco-dot-com]
Sent: Monday, August 24, 1998 7:14 PM
To: 'Tesla List'
Subject: FW: glass caps.
Some of you responded to my question about plastic bottle SW caps. More
correspondence has transpired, so, for edification of the list, this came
from Kip, worlds oldest nerd and icon of the weird sci crowd:
> Will,
>
> Having made capacitors....a long time ago, in a galaxy far, far away.....
> I feel entitled to have an opinion on the homemade capacitors.
>
> This can happen with ceramic...and may be a hazzard when the dielectric
> is glass. A sudden change in voltage...either charge or discharge puts
> quite a mechanical impact on the brittle dielectric. It isn't a lot of
> force, but it's quick and might cause a mechanical break and then failure.
>
> So my suggestion is: How about the new plastic soda pop bottles. Have
> you
> tested them ?
>
> Oh, I had good results with a di-film construction on capacitors for pulse
> applications. About equal thickness of paper and mylar and vacuum dry the
> paper and oil impregnate it. It seemed to give long life at about 1 KV /
> mil
> field strength....and you get a lot of capacitance in a small space. Any
> air bubbles in the high field areas may cause internal corona and failure.
>
> Still ain't found that picture....but I haven't forgotten it. I think
> it's
> the only one of the "machine".
>
> Kip
>