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Re: Pole Xfrmer, what is the best voltage choice???.....



Original poster: "sundog by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sundog-at-timeship-dot-net>

Hi All, David?

 I'd say keep the 14.4kv pig.  I've driven mine with 120v on the 240v taps
for 7200v, and driven it with 120v on the middle tap and an outside tap for
14kv (you should run at least 120v20A, or the output of the pig is
pathetic).   The Geek Group's caps are a good buy for TC'ing, and will stand
up to quite a bit of abuse from what I've heard.  If all else fails, you can
make their SW bucket caps (a 12pack SW cap housed in a 5 gal bucket, clean,
neat, and cheap!).   Rolled caps have been replaced by the MMC's for the
most part.  more space efficient, less mess, and a lot more reliable.  I'd
vote buy an MMC, run the pig at a sane (2-3kva) power level, and work
towards making the coil efficient.
Just my $.01 (I'm a bit short today)

Shad
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, November 02, 2001 10:02 AM
Subject: Re: Pole Xfrmer, what is the best voltage choice???.....


> Original poster: "david baehr by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<dfb25-at-hotmail-dot-com>
>
>
> Yes, but if I series them, I'll need 8 /60mil caps. My 8" coil used 2
R.Hull
> caps for approx. .036-.038. Kinda strange, thoes caps held up for many 5kw
> runs, up to 2or 3 minutes at a time, but when I was playing with a small
(3"by
> 12") coil with a 12kv neon it shorted out one of the caps......bad timing
> or???????????
> Maybe instead of  7600v , maybe 9000v-10,000v??? or I'll just keep the 'ol
> 14400
> >From: "Tesla list"
> >To: tesla-at-pupman-dot-com
> >Subject: Re: Pole Xfrmer, what is the best voltage choice???.....
> >Date: Thu, 01 Nov 2001 08:27:46 -0700
> >
> >Original poster: "by way of Terry Fritz "
> >
> >In a message dated 10/31/01 11:36:35 PM Eastern Standard Time,
> >tesla-at-pupman-dot-com writes:
> >
> > > I've purchased another 14400/5kva like the one I sold a few years
back. Now
>
> >I'
> > > m
> > > having second thoughts about the voltage.A few years back I remember
seeing
>
> > > Mark Graalmans "Pandora" coil performing very well with a 7500v or so
> > > transformer.....this lower voltage makes cap construction a bit
easier, my
> > > last
> > > coil used the tcbor 60mil rolls....and I held my variac to 200v for
12kv
> >to
> > > the
> > > caps, but I've read even then they are on the limit......60mil would
have
> >an
> > > easy time at 7600v...........should I keep the 14400 or trade for a
7600???
>
> > > Whats the pros and cons????....It will be used for a 8" to 10" dia.
coil
> > > THANKYOU!!!!!!!
> >
> >I'd say definitely use the higher voltage. If you use the higher
> >(double) voltage, the cap value can be just 1/4 the value, for
> >the same overall bang size. So the capacitor will
> >actually be no larger, (use two physically smaller caps in
> >series), and you'll get the tremendous advantages
> >that higher voltage operation provides, (fewer gap problems,
> >lower gap losses, etc.)
> >
> >John
> >
> >
> >
>
>
> ----------
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