# Re: Compulsators 6 million amps of raw power!!!

```Original poster: "Luc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ludev-at-videotron.ca>

Hi Drew

First to reach resonance as you increase the cap value you need
to decrease the value of your primary inductance and you can do
it only on a certain limit. Example: imagine you have a coil 4"
in diameter the smallest primary you could practically use is 1
turn 5" diameter ( around 300 uH ) if your coil have a resonance
frequency of 200 kH you need a cap of 2.1 uF If you go with a
bigger cap you need a smaller primary not really possible (
calculated with Wintesla ). As John Freau could testified the
smaller the inductance the bigger the lost of power in the gap .

An other thing the cap you plan to use are electrolytic type not
design for pulse use and  above all not make to see polarity reversal.

Luc Benard

Tesla list wrote:
>
> Original poster: "Drew Murray by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <drewallmighty-at-hotmail-dot-com>
>
> Hello,
> I have been doing some research on railguns and i heard about something
> called a compulsator. Do spark gaps have to exist? Can a tesla coil primary
> tank circuit run on low voltage but at huge amounts of current.
> (compulsators can produce currents in ecess of 6000000 amps). Imagine a huge
> bank of high capacitance capacitors charging in a tiny fraction of a second
> to currents around 1 - 5 billion amps and then discharging it into the
> primary of a very rugged tesla coil. To take the place of a spark gap maby
> there could be a rotary SG like unit with stationary brushes that make
> contact with the electrodes on the disc. Huge semiconductors of VTs might
> work as well. Give me your thoughts on the subject. I am going to try this
> on a smaller scale with a couple 120000uf 50vDC caps that i picked up the
> other day. They are 3" in diameter and are around 14" long.
>                                                         Drew
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```