BIG Capacitors

To: "'Tesla List'" <tesla-at-pupman-dot-com>
Subject: BIG Capacitors
From: Tesla List <tesla-at-stic-dot-net>
Date: Thu, 19 Feb 1998 22:57:18 -0600
Approved: tesla-at-stic-dot-net

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From:  Eleanor Flood [SMTP:eflood-at-bellsouth-dot-net]
Sent:  Sunday, January 04, 1998 4:08 PM
To:  Tesla List
Subject:  Re: BIG Capacitors

Tesla List wrote:
> 
> ----------
> From:  Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
> Sent:  Wednesday, February 18, 1998 3:51 PM
> To:  Tesla List
> Subject:  Re: BIG Capacitors
> 
> Perhaps I can help:
> 
> > From:  Bill Lemieux [SMTP:gomez-at-netherworld-dot-com]
> > Sent:  Tuesday, February 17, 1998 5:02 PM
> > To:  Tesla List
> > Subject:  Re: BIG Capacitors
> >
> > Justin Oliver wrote:
> >
> > > Does anyone know where I could obtain several capacitors (surplus or new)
> > > rated at over 100uF and at a voltage of 18Kv or over. These caps will go to
> > > use as part of a circuit in a coil crush experiment.
> >
> > You are looking for a 16 _kiloJoule_ capacitor, which is a non-trivial
> > thing.  Given the nature of your experiment, you are also looking for
> > caps specifically designed for pulse-discharge, ie, low-self-inductance,
> > low ESR, and a certain amount of voltage-reversal capability.
> >
> > The only people I know of who make such beasts are Maxwell Laboratories.
> > http://www.maxwell-dot-com
> >
> > However, depending on the size and mass of your experiment, you may
> > not need that much energy storage- are you certain of your
> > requirements?  How many of these caps do you need?
> >
> > I have a few exotic ultra-low-inductance pulse-discharge caps, but they
> > aren't in that energy storage regime.
> >
> > -Gomez
> 
> The caps are used in a non-repetitive situation so the only real
> qualities they must have are being able to consistently withstand the
> applied DC voltage with a safe margin and low ESR (extended foil is
> mandatory). A design for a dry-fired rolled cap that fits this
> description is available on Jim Fosse's Website and also I think on
> the nic.funet site. These caps are relatively cheap to build and you
> can scale the design without degrading it or build a number of them
> an parallel them up. Yes, it's my design.
> 
> Malcolm
> 
> 
> > --
> > .......................................................................
> > .                personal email: gomez-at-netherworld-dot-com                .
> > .          personal web page: http://www-dot-netherworld-dot-com/~gomez       .
> > .......................................................................
> >
> >
> >
Please, need URL address for nic.funet and/or Jim Fosse website.
We are new at this and do not have the addresses.
We would like to build our own BIG capacitors, if possible.
Thanks.
Elli