Re: KVA Model 9J

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

Original poster: "bob golding by way of Terry Fritz <twftesla-at-qwest-dot-net>" <yubba-at-clara-dot-net>

hi Malcolm,
    I am using a variable speed rotary with 8  flying electrodes and 4
static electrodes configed in two pairs. Max spark length is at about 1500
R.P.M. I think this equates to about 215 B.P.S. I can never remember the
formula. This is just before the caps catch fire ;-))

cheers
bob
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, October 07, 2001 9:48 PM
Subject: Re: KVA Model 9J


> Original poster: "Malcolm Watts by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>
>
> Hi Bob,
>        Those numbers sound quite reasonable to me. Similar in fact to
> a magnifier one of Richard Hull's contemporaries built once (a
> picture of it was featured in Richard's "Guide To The Colorado
> Springs Notes"). I do have a question: What is your breakrate? If you
> can get a handle on Ep*BPS you could compare that with your measured
> power draw to see what kind of wallplug efficiency you are getting.
>
> Regards,
> malcolm
>
>
> On 6 Oct 2001, at 14:47, Tesla list wrote:
>
> > Original poster: "bob golding by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
> <yubba-at-clara-dot-net>
> >
> > Brian,Justin, all,
> >     I have just plugged in the numbers for my big coil. I am getting
regular
> > 7 foot arcs with 2.2 kva input. either I am pushing more than 2.2 kva
though
> > my tranny or the coil is very efficient. Must check the input current
again.
> > with a digital multimeter across the variac it is drawing around 8 amps.
The
> > output voltage is 8200v and the cap is a 70nF mmc. the sec is 42" x 10"
> > wound with 18 awg wire. I have both a static and a rotary gap.The arc
length
> > is about the same except that the static gap doesn't quench very well.
The
> > top load is one Finn hammer toriod with a 48" x 8" ducting toriod on
top.
> > The Frequency is about 129 kHz----- Comments anyone?
> > cheers
> > bob golding
> >
> > Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Saturday, October 06, 2001 8:28 PM
> > Subject: RE: KVA Model 9J
> >
> >
> > > -----
> > > 10J
> > > 25 ft, 240V, 100A, therefore 24KVA or 1.04 ft/KVA
> > >
> > > 9J
> > > 16 ft, 240V, 75A, therefore 18KVA or 0.88 ft/KVA
> > >
> > > 8J
> > > 12 ft, 240V, 50A, therefore 12KVA or 1.00 ft/KVA
> > > -----
> >
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