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Re: Better Gap Worth Effort

Hi all

If I understand the coupling have an influence on how fast the energy is
transfer
to the secondary but if you increase the coupling you have racing spark
:Maybe it
could be an improvement to increase the insulating quality of the coating
of the
coil without increasing to much the self capacitance ( high insulating factor
,low dielectric coating) .Could this approach be helpful : Increasing transfer
,decreasing quenching time , less lose in gap?

Luc Benard(Montreal)

Tesla List wrote:

> Original Poster: FutureT-at-aol-dot-com
>
> In a message dated 4/30/00 3:30:16 PM Pacific Daylight Time, tesla-at-pupman-dot-com
> writes:
>
> > End 1996, begin 1997 there was a (VERY long) thread called "Optimal
> >  Quenching Test". I didn't read it completely yet, but one statement of
Bert
> >  Hickman striked me: 'If you get an arc to ground during the first transfer
> >  none of the secondary energy ever makes it back to the primary, and you
> will
> >  quench at the first notch'.
> >
> >  I can imagine there are more demands that must be met before this will
> >  happen, but is seems logical to me. Could this explain why you and others
> >  haven proven that quenching on the first notch is not 'of the utmost
> >  importance'?
> >
> >  Ruud de Graaf
>
> Ruud,
>
> Yes, back then, there was an opinion that 1st notch quench was
> very important, and a number of attempts were made to achieve it.
> 1st notch quenching was achieved, but no real improvement was
> seen in the spark output.  Bert is right that a ground strike sucks
> the energy out the system so fast, that there's no energy left to
> transfer back to the primary, so the qap quenches on the first
> notch.  The time of quench depends largely on how fast the energy
> is drained out of the system by the spark streamers (assuming a
> fixed value for Fo and k of course).
>
> I think Terry explained it very well the other day, when he described
> how the streamers (even with free air streamers if they're nice and
> strong), drain away so much energy (quickly enough), that the
> feeble amount of energy that might make it back to the primary
> (and thereby delay the quench), hardly hurts the spark output.
> Meanwhile, if one attempts to actually achieve the first notch
> quench by using multiple gaps, etc, this can reduce the spark
> output due to the greater losses.
>
> Cheers,
> John Freau
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