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Re: I Need some Help.
Original poster: "Jonathan Peakall by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jpeakall-at-madlabs.info>
Those caps will blow easily in TC service, though they are useful for other
things. I ran a IC powered coil off 'em, but they blew quickly with any
increase in power. OBITs blow them up quick. I have used them in mini Marx
generators and in voltage multipliers.
----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
Sent: Monday, June 03, 2002 10:09 AM
Subject: Re: I Need some Help.
> Original poster: "Vivek Babtiwale by way of Terry Fritz
> Capacitors are the heart of Tesla coils try using the
> following for the capacitor:
> .001 UF 10 KV AXIAL CERAMIC DISC CAPACITOR
> CAT# HVD-102
> $ 1.00 each
> 10 to 99 $ 0.85 each
> 100 or more $ 0.70 each
> In stock
> You could also visit
> for theory and formulas or do the experimental way,
> which means you'll have to either tripple the amount
> of turns on the primary for a wider tuning range
> and/or put more 20KV ( 10kv series with 10kv = 20kv
> )string in parallel. Just tap from rung to rung on the
> primary till the screwdriver starts getting zapped.
> Ships within 24-48 hours
> Two in Series = 20 KV
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <TeraJoule-at-aol-dot-com>
> > ~Hello
> > I have been working on my first coil for a
> > few weeks now. I finished it
> > and turned it on. There was no discharge off of the
> > Sphere on the secondary.
> > However there is a little arc (and I mean little)
> > when I place a piece of metal
> > next to it (something like a screw driver). I've
> > been wracking my brain to try
> > and fix this problem and I was wondering if one of
> > you fine gentlemen would
> > help me. I think it is something with the frequency
> > of my circuits. I believe
> > they are mismatched...
> > The Dimensions of my coil are as follows:
> > Secondary uses 30 gauge copper wire that is wrapped
> > around a PVC pipe 7/8 in.
> > diameter and 8.25 inches tall. (about 700 turns) the
> > sphere on top is .75
> > inches in diameter.
> > The transformer is 9000 V NST and 30 mA. It's rated
> > at 120 V.
> > The capacitor has 17 sheets of 5.5 in. x 6 in.
> > separated by .1 in. window pain
> > glass. (I don't know the dielectric value.) If it
> > makes any difference, only
> > 4 inches of the foil overlaps for each of the plates
> > ( a 6 inch x 4 inch plate)
> > The spark gap is non-rotary and can be adjusted to
> > any distance it needs to be
> > at.
> > The primary is helical and is basically 5 turns of
> > wire. 3.5 in. in diameter,
> > spaced 1 inch from eachother. (I would be most
> > willing to change this or the
> > capacitor.)
> > I would be forever grateful if someone could help me
> > work out the flaws in this
> > design. Thank you very much for all of your time.
> > Sincerely,
> > Alex