Re: The finger of God.

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

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

On 19 May 01, at 17:40, Tesla list wrote:

> Original poster: "Dr. Duncan Cadd by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <dunckx-at-freeuk-dot-com>
> 
> Hi Chris, All!
> 
> Hmmm, bizarre!
> 
> >hmmmm ok...we're running 12/180 with 6 strings of the .1 caps, 9 caps
> per
> >string......with the pig at notch 4 it draws 20A and the MMCs will
> trip a
> >20A breaker in time......ok...if we use notch-4 and hook up the pig
> it
> >should work.
> 
> 
> You mean with nothing changed on the coil except the power supply it
> doesn't work?!  Ow!!!!!
> 
> If you used the exact same setup as with your NST farm but simply put
> the pig on it I can't imagine why anything should change (but then
> I've never run a pig system, though can't imagine tuning is so greatly
> altered simply by swapping one for a bank of NSTs or vice-versa.)
> 
> I can't quite bring myself to believe that something in the pig is
> shunting the rf to earth (how?!!) but sticking a couple of rf chokes
> in the HT leads would soon knock that hypothesis firmly on the head.
> That at least would be something fairly quick, cheap and easy to try
> (and probably quite pointless, but who knows?  You may be desperate
> enough to try anything ;-)
> 
> >This went on for over 2 hours, with everything from notch 1 to 4, and
> up to
> >10 strings of caps.
> >
> >I can get it to tune, meaning at turn 3 it makes little, wus sparks
> about 5"
> >long that I wouldn't be scared to put my tongue on they're so faint.
> 1 turn
> >either way and nothing at all. The gap fires beautifully....just no
> output.
> 
> 
> *That* sounds rather as if it's operating at a harmonic.  Either the
> primary is operating at too low a frequency and the secondary is
> picking up one of the harmonics, or the primary is operating at too
> high a frequency and stimulating one of the secondary higher modes.
> 
> When you get the chance, take the NST farm off again, stick the pig
> back on leaving the same tuning and gap settings as for the NST farm
> with the 48 inch sparks and try with rf chokes (say 20mH or so -
> perhaps a couple of "spare" secondaries if you don't have rf chokes to
> hand?) in the HT leads from the pig.  I can well understand you
> pulling your hair out over this one . . .
> 
> Anyone else?
> 
> Dunckx
> Geek#1113 (G-1)

Is the gap firing normally (nice crisp distinct bangs) or is it 
fizzing and power arcing? Do you have the gap or cap across the 
transformer? What are you using for ballast inductance? 

Regards,
malcolm