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Re: flat caps (fwd)
---------- Forwarded message ----------
Date: Sat, 22 Feb 1997 21:31:47 -0500
From: Thomas McGahee <tom_mcgahee-at-sigmais-dot-com>
To: tesla-at-pupman-dot-com
Subject: Re: flat caps
----------
> From: Tesla List <tesla-at-poodle.pupman-dot-com>
> To: Tesla-list-subscribers-at-poodle.pupman-dot-com
> Subject: Re: flat caps
> Date: Sunday, February 16, 1997 3:53 PM
>
> > Subject: Re: flat caps
>
> Subscriber: pwac-at-flinet-dot-com Sun Feb 16 13:53:03 1997
> Date: Tue, 04 Feb 1997 13:08:51 +0500
> From: Jeremy Bair <pwac-at-flinet-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: flat caps
>
> Tesla List wrote:
> >
> > Subscriber: Esondrmn-at-aol-dot-com Sat Feb 15 15:44:40 1997
> > Date: Sat, 15 Feb 1997 03:00:16 -0500 (EST)
> > From: Esondrmn-at-aol-dot-com
> > To: tesla-at-pupman-dot-com
> > Subject: Re: flat caps
>
> <....
> ....>
>
> > I recently made one that is .00475 mfd with two layers of .062 poly
(for each
> > layer) and those plates are 47" long. This cap just barely fits into a
6"
> > pipe section.
> >
> > Ed Sonderman
>
> I have been taking apart small Capatictors just to get an idea of how
> they are arranged, I was amazed to open some of the rolled ones, they
> are awsome! After realizing it, all my caps I have ever used were rolled
> (About a year ago, I opened one for the first time to discover metal
> plates and tons of oil, now I can't find that one again!). I think
> rolled caps would be better for me. Let me ask you though, some small
> ones I opened (200V-at-220uf) had a sort of paper and metal materials
> soaked in oil, was this 'paper' like material a plastic? It was so
> soaked, I can't tell what it was, and how come to two windings of metal
> are different materials, one is shinnier than another.
>
> And did you use an oil?
>
> <...you would need plates of
> 1010 square inches / 14" (std. width of roof flashing) = plates
> 72.14"...>
>
> Roofing Flashing? Wasn't that material thick? What is wrong with using a
> whole roll of Aluminum Foil?
>
> Jeremy Bair
Jeremy,
Be careful. Some of the older capacitors contained PCB's and other nasty
chemicals that have been shown to produce cancer. If a capacitor's type
of oil is not known, it is best to leave it alone! Capacitors produced
since about 1980 are probably OK, as PCB's were banned since then. Still,
it is best to treat ALL unknown chemicals as dangerous.
Fr. Tom McGahee