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Re: Capacitor in question
From: Bert Hickman[SMTP:bert.hickman-at-aquila-dot-com]
Reply To: bert.hickman-at-aquila-dot-com
Sent: Thursday, August 07, 1997 8:38 AM
To: Tesla List
Subject: Re: Capacitor in question
Tesla List wrote:
>
> From: Richard Staron[SMTP:rstaron-at-widow.aracnet-dot-net]
> Reply To: rstaron-at-widow.aracnet-dot-net
> Sent: Tuesday, August 05, 1997 5:35 PM
> To: tesla-at-pupman-dot-com
> Subject: Capacitor in question
>
> Hi and thanks for reading my request.
>
> I have just picked up some capacitors, 3 to be exact from one
> of our local surplus places and I was wondering whether these
> could be used in a small coil. The coil that I am building is
> 4" Diam x 18 long being driven by a 15kv -at- 30 ma neon transformer.
> I was hoping to put these in series but before I made up a support
> for them, I thought I had better ask the experts if anyone knew
> if they were any good or not.
>
> The capacitors in question are described as follows:
>
> 5.75" long x 1.25" diam
> Body is brown in colour with a screw terminals produding one from
> each end.
>
> They are made by CONDENSER PRODUCTS
> .0125 UFD -at- 25000 VDCW
> Model number KMOB 123-25MN
>
> There is also another number printed on the body as 1210-107.
>
> If anyone knows whether these would work or not, a reply would greatly
> be appreciated.
>
> Regards
>
> Richard
Richard,
Based upon the physical size and ratings, it sounds like those may be
mylar dielectric caps. You may want to call CP for additional
information.
Or you could connect two or three in series and begin seeing if they
will stand up to disruptive use in your TC. Try running them only for
short periods of time to see if they show any signs of getting warm.
They could work for short periods of time even if made from mylar as
long as you didn't overheat them. However, they won't perform anywhere
nearly as well as high-power pulse caps which use polypropylene
dielectric.
-- Bert --