Re: Strike Balls

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

Original poster: "cd by way of Terry Fritz <twftesla-at-qwest-dot-net>" <vbprg1-at-hotmail-dot-com>

Wow uncool autotransformer action.
I had a feeling that something of that nature was occuring.
I wonder what type of field I really am kicking out with my Primary.
Im guessing the autotransformer effect is creating a non pulsing buildup
voltage, but what kind of field effect is that creating? None till it jumps
a turn of outer primary? Then an instant of Overcoupling?

Id really appreciate an Idea of what a maximum spark length might be?
a 10 amp variac running 120 out to 2x 12000v30ma neons in parralel run
through
a 4 inch secondary with vacum gap and Salt's for caps.

Even a guess would give me some measure of my setups efficiency is before I
modify it.
I can confirm output with a breakout point making 24 inch strikes to a
lightbulb.
A breakout point would actually reduce my actual breakout spark length so...
Whats the 12000v60ma 4inch secondary vacum gap salty record? :)

Cutting it down and moving the strike rail up/out may be the answer.
But Im thinkng I may not want to cut to many turns off...
I still have 6 plus pounds of 26awg magnet wire and
my primary decking will mount an 8inch secondary with minimal modifications.
How many turns would I need to drive a 8inch OD by 40 inch wraping? Is 1to5
to much for a 8 inch coil form? Would I have to increase my 12kv 60ma power
suply just to drop the tuning point inside my 20 turn primary?

Im also thinking of icreasing my topload by adding a aluminum sphere on top
of my torus.
Has anyone played with the ball on top of torus configuration? Torus for
protection factor ball for maximumizing surface area....

Thanks for data/advice
Chris


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, July 12, 2002 1:28 PM
Subject: Re: Strike Balls


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<FutureT-at-aol-dot-com>
>
> In a message dated 7/12/02 12:26:10 PM Eastern Daylight Time,
tesla-at-pupman-dot-com
> writes:
>
> Chris,
>
> Yes, the unused turns build up a high voltage by autotransformer
> action, which can jump to the strike rail.  The solution is to either
> cut off some primary turns, or build a new secondary using more
> turns, so you use more turns of the primary.  I always like to
> have extra turns on the primary in case I modify anything which
> may then require the extra primary turns.  If you do cut off
> the extra turns, you can cut it at turn 12 or 13, leaving you
> 3 or 4 extra turns.  Better yet, just remove about 3 turns and
> see if it solves the problem.  Better yet, move the strike rail
> farther from the primary and see if that solves the problem.
>
> John
>
>
> >
> > I think my problem lies in the fact that I built a rather massive
primary
> > 20 turns of 1/4inch copper tubing and now its tapped or tuned around the
9th
> > turn. That leaves 11 turns of coil hanging out there. More than enough
coil
> > to drive a big secondary....
>
>
>
>
>
>