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Re: Report on Scoping Work Coil

In a message dated 99-12-08 14:35:05 EST, you write:

<< Original Poster: "Malcolm Watts" <malcolm.watts-at-wnp.ac.nz> 
 
> Hi all,
>            I finally got around (and the guts) to scope my work coil 
> running normally to see what its BPS is (special interest for Boris 
> and John Freau). Ep is around 3J max for this coil.  snip
>        In general, BPS appeared to be 100. Sometimes, it appeared 
> to fire twice per 1/2 cycle, other times it appeared to miss a beat 
> (npi).   snip
 >       I looked for myself and sure 
> enough, the coil was reaching out and attaching all around. Max 
> strike distance was somewhere in excess of 3.5' regularly and over 
> 4' occasionally.   
>         Even supposing that the scope was lying and the thing was 
> firing at 200BPS, that is still a primary power of around 600W for 
> 4'+.  All this with a simple single 1/2" electrode W-C static gap.
> Is anybody out there keen on duplicating this coil and conducting 
> their own investigation?  I am restricted in both space and 
> opportunity to run it since I no longer own it.

Hi Malcolm,

Thanks for your important report.  Your's is still the most "efficient"
coil I've ever heard of if it's running near 100 bps, which it certainly
appears to be doing.  If it's running 200bps, then my best TC results
are similar, but never at 240 bps, I always get best results at 120
bps for my coils.  So the efficiency of your coil seems exceptional
at either bps.

(Note to new list members:  I'm writing "efficiency" in quotes because
I'm using it to mean spark length vs. cap watts.)

Your intriguing TC efficiency results, which seem to exceed greatly
any other TC, certainly deserve and demand that more work be done. 
Lack of space is an issue I'm plagued by also.  I wonder if there's a
particular aspect of your TC that gives it it's efficiency, or if it's due to
a synergy among the components?  I could gradually modify my TC 
to make it more like yours.  For instance I could try a big oblate toroid,
then a 10" by 40" space-wound secondary, etc.  I'd have to build a 
special flat base, to keep the coil away from the ceiling, etc.  I'll see
what I can do.  Wouldn't it be nice if a coiler, who has plenty of
space, etc, would jump quickly at this opportunity to explore and
discover.

Cheers,
John Freau
 
 >Regards,
 >Malcolm >>