Re: SW cap - another question

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "BunnyKiller by way of Terry Fritz <twftesla-at-qwest-dot-net>" <bigfoo39-at-telocity-dot-com>

Tesla list wrote:

> Original poster: "Johnson, Jeffrey D -at- PWC by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <jeffrey.d.johnson-at-l-3com-dot-com>
>
> Coilmeisters,
> On the topic of SW caps, what about using a plastic bottle made of PETE or
> HDPE?  I realize PETE is very high loss (.010) but has 4kV/mil dielectric
> strength meaning you could use the small thickness of a plastic bottle
> (maybe?).  HDPE has much lower loss (<.0002) and 1.2kV/mil.  All the soda
> bottles I've seen are PETE.  They also have a corrugated bottom which I
> don't know how to deal with.  Any thoughts?
> thanx,
>
> JJ
>
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Sunday, September 30, 2001 9:07 AM
> To: tesla-at-pupman-dot-com
> Subject: Re: SW cap
>
> Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <ghunter31014-at-yahoo-dot-com>
>
> Hi Jason,
>
> Wine bottles are not very uniform. Lotsa variation
> from brand to brand. I've measured a few. 1.2 to 1.7nF
> is a good guestimate.
>
> Greg
> http://hot-streamer-dot-com/greg
>
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "Jason by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <jasonp-at-btinternet-dot-com>
> >
> > Hi all,
> >
> > I have just constructed an SW cap. It is basically a
> > wine bottle filled with
> > concentrated salt water. It has a copper wire going
> > down the middle of it,
> > and the tinfoil is connected around the whole of the
> > cylindrical part of the
> > bottle. It is then filled up to the neck with motor
> > oil, and stopped with a
> > rubber wine cork. I was wondering a number of
> > things:
> >
> > 1) What is the capacitnce (not exact of course, i
> > mean is it 1nF, 10nF,
> > what?)
> > 2) Why does it hiss when connected to a neon (sounds
> > like air ionising)
> > 3) What are the dielectic properies of glass?
> > 4) Does the salt water just act as a conductor
> > rather than part of the
> > actual capacitor? I have access to purified mercury
> > - what would this be
> > like instead of salt?
> >
> > Thanks all,
> >
> > Jason
> >
> >
> >
>
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here is a little poem about caps...


I sit here and pout
thinking about the money Im out
making my homemade caps
just listen to pops and snaps
I should have done the MMC
ohh how much happier I would be..
Maxwells are nifty
but they arent thrifty
at a price of onehundredandfifty
ohhh how much happier I would be
If i had done the MMC........


Scot D