Re: Polypropylene dielectric

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: Polypropylene dielectric
From: Tesla List <tesla-at-stic-dot-net>
Date: Fri, 21 Nov 1997 18:21:14 -0600
Approved: tesla-at-stic-dot-net


From: 	Bert Hickman[SMTP:bert.hickman-at-aquila-dot-com]
Reply To: 	bert.hickman-at-aquila-dot-com
Sent: 	Friday, November 21, 1997 8:54 AM
To: 	Tesla List
Subject: 	Re: Polypropylene dielectric

Tesla List wrote:
> 
> From:   Steve Rodway[SMTP:Legion-at-bigfoot-dot-com]
> Sent:   Thursday, November 20, 1997 11:38 AM
> To:     Tesla List
> Subject:        Polypropylene dielectric
> 
> General Electric is selling some polypropylene dielectric capacitors
> (see http://www.ge-dot-com/capacitor/brochures/pcap/dielkunits.html for
> details) with suitable vltages and good BIL ratings, I was wondering if
> they are suitable for tesla coil work.
> --
> ***************************************************************************
> *Stephen Rodway             Legion-at-Bigfoot-dot-com *Heisenberg:We are not
> sure*
> *Tel. +44 1684 567588                          *which side of the road
> the*
> *For Email use PGP where possible.             *  chicken was on, but
> it  *
> *http://www.legion-elec.demon.co.uk/index.htm  *   was moving very
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> ***************************************************************************

Stephen,

Not really... even though they have the right dielectric, they are not
really constructed as pulse caps, and their capacitance tends to be much
larger that what you'd normally use in a coil. For example a 21600 volt
100 KVAR unit will have about 0.57 uF at 60 Hz. This is about 10 - 20X
larger than what you need. Now, if you got a batch of them cheaply, you
might be able to disassemble them and repackage the internal modules to
make a bunch of properly-valued caps. 

-- Bert --