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Re: what happens if i use a marx cap arrangement on a TC?

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Chris,
          Marx bank caps needn't take a long time to charge. You can 
use chokes in place of the resistors and it's *possible* you may be 
able to tailor the L's and C's to effect resonant charging (whose 
output = banga banga banga......). I built two small Marx banks which 
used this principle. Multi-section pulse caps might not be the best 
animals to use for this unless there is an internal resistor chain to 
prevent DC imbalances due to leakage currents and capacitance 
differences between sections. 
     There is a modified circuit which would be suitable for driving 
TCs which a couple of us thought of independently a few years ago but 
I don't have the details handy or the time to post them today.


On 19 May 01, at 20:57, Tesla list wrote:

> Original poster: "Christopher Boden by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <chrisboden-at-hotmail-dot-com>
> >Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
> ><RQBauzon-at-aol-dot-com>
> >
> >like i said, what happens if i use a marx cap arrangement on a TC
> >instead of using "the usual" arrangment?
> >
> Short answer:
> Nothing happens, you get frustrated, increace the power, it burns, you
> cry.
> Long answer and safety rant:
> The Groucho Project that the Group is building is a small Marx bank
> (get it?). You have to understand the basics of how they operate.
> A Marx bank is a high voltage, pulsed DC device. A bank of High
> voltage, pulse duty caps are charged while hard wired in paralell.
> When the voltage reaches a set level (controlled by the spacing of
> several spark gaps, with the bottom one often a triggered gap) the
> caps discharge in series. If you have a bank of 10 caps in a Marx
> array and each cap is 100,000 volts, you only need a 100,000 volt DC
> power supply to charge them. But when they discharge, in series, you
> get 1,000,000 volts.
> Then you start over, this takes a LOT of time compared to the TC world
> where chargeing takes 1/120th of a second.
> A Tesla Coil is an AC device (ok ok ok I know, but let it go for this
> one ok?) and if you use DC rated caps in AC service you'd better have
> a bigger supplier than I do (and I have corporate sponsorship for my
> caps).
> There is a possibility that you COULD use a Marx bank to power a
> single-shot coil, but it would be a LOT of work for a little effect.
> The Marx bank makes great arcs on it's own.
> I STRONGLY, FIRECELY, RECCOMEND you spend a month reading before you
> pick up any HV gear. There is a website that has a TON of textbook
> type info on everything from the basics of electricity to Lux-Level
> theory and esoteric stuff that makes me feel REALLY dumb.
> I can't find the link guys, what the URL on that site? It's a GREAT
> site and I reccomend it for ALL newbies, especially RQBauzon, from the
> questions I've seen you ask, there's gonna be a pool going on your
> life expectancy if you get a couple NST's, and I do NOT wanna see a
> new student get hurt, or killed. I'm the
> ultra-paranoid-safety-freak-of-science so that's how I see it. I put
> out 5 fire extinguishers for a Tesla Demo today, though we've NEVER
> had an unintentional fire. I'd rather have them there and not use
> them, then vice versa.
> Have fun, and don't get dead.
> Duck
> Christopher A. Boden Geek#1
> President / C.E.O. / Alpha Geek
> The Geek Group
> www.thegeekgroup-dot-org
> Because the Geek shall inherit the Earth!
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