[TCML] Proper VTTC Coupling?

[Dr. John W. Gudenas]

John
Give me some idea of "small". I have, in the past, tightly coupled  
811A coils with excellent performance.
John W. G.

John W. Gudenas, Ph.D.
Professor of Computer Science
On Oct 18, 2008, at 4:32 PM, futuret at aol.com wrote:

> Does anyone have any suggestions for the best coupling value
> for a small VTTC?  I usually use something around 0.2 or 0.18
> but those figures may have actually been lower.  I did some
> experiments at k = 0.3 or so, but a flashover destroyed the
> primary and secondary.  Has anyone loosened the coupling to
> 0.10 or so and seen any reduction in spark length?
>
> Has anyone noticed if the spark characteristics change with
> various couplings?  I saw some evidence that too tight coupling
> ruins the sword-like spark effect.  Not sure though.  I'm
> aware of Steve Ward's work in which he found that a too-low
> frequency killed the sword-sparks.  In my own work, I found
> the sword sparks to be affected by various parameters and
> adjustments.  I never attempted to verify the frequency idea.
>
> Thanks,
> John
>
>
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