Re: [TCML] Sudden and unexplained destructive racing spark flashovers

["Dex Dexter" <dexterlabs@xxxxxxxxxxx>]

I suspect that "sweet performance coupling spot" k=0.13-0.14 you found for your coils can't be extended to all designs.
For example,well known Nemesis coil built by Richard Hull gave the best performance with k>0.2.The coil also had extraordinarily large toroid instaled althought that seems less important becouse you use large enough toroids too.But Nemesis had the secondary height to diameter ratio aprox H/D=3.25.If I remember you said you make all your coils with H/D=4.5.Maybe there's some dependence involving H/D,k and optimum performance..

Dex 


> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of DC Cox
> Sent: Sunday, July 05, 2009 9:04 AM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Sudden and unexplained destructive racing spark
> flashovers
>
> I'm just reporting from practical experience in coil building.
>
> If you exceed 0.14 in classic type coils, especially around 0.18 and above,
> racing sparks will occur.
>
> There is no reason to exceed this coupling value.  If you do your output
> sparks will diminish in length, not grow.
>
snip>
>
> Dr. Resonance




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