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Re: Solid Toroid Beneficial?

On Sun, 12 Mar 2000 Tesla List  wrote:
> Original Poster: "Gary Johnson" <gjohnson-at-ksu.edu> 
> 
Snip
> It would definitely
> form a shorted turn at the top of the coil.  The other toroid is made from
> about 15 lengths of quarter inch copper tubing spaced about a quarter inch
> apart.  The center is open, so there is no place for eddy currents to flow.
> Size and capacitance are almost identical to the half spun toroid, so
> resonant frequency is basically the same.
> 
Snip
> The trends
> are consistent: more current = more input power = higher top voltage =
> longer spark (if voltage is high enough for breakout).  The surprise is that
> this occurs for the shorted turn toroid rather than the open turn toroid.
> Has anyone else seen this effect?  Does the effect show up in PSPICE models?
> Is there a 'simple' explanation?
> 
Snip 
> Gary Johnson
> 

Hi Gary,

Very nice experiment, but you may only compare the measured values if you
take unseen discharging into account. The copper tubing pieces are a
quarter inch apart. This gives unwanted discharging a change, because of
the less rounded
surface. You could check the two toroids on top of a Van de Graaff
generator. If the load-time before discharge to a mounted grounded object
is the same, you may assume that this parameter is out of the way!

Good luck with yoour experiments! Keep us informed!

Ruud de Graaf
Greetings from lovely and dry Holland