Re: [TCML] Bipolar tesla coil

["Kurt Schraner" <k.schraner@xxxxxxxxxxx>]

-----Ursprüngliche Nachricht----- 
From: Jim Lux
Sent: Sunday, December 23, 2012 11:50 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Bipolar tesla coil

On 12/23/12 10:48 AM, Kurt Schraner wrote:
> A fairly complete report about my version of a bipolar tabletop coil can
> be downloaded here:
>
> http://twfpowerelectronics.com/~kurt/EBM-Museums-TC-2.pdf
A very pretty coil.

about 1000 turns on the 2 1/2" x18" secondary, 5 turn primary tapped
down to 4 turns. 18nF primary C.

I like the three pipe gently blown gap (because I use one identical to
it!).. for low power coils, I've had good luck.. it's more easily
adjustable than a two pipe gap, it's only two gaps, so gap losses are low..

That's a fairly high current low voltage NST compared to typical
practice here in the US (it's like a 12kV 60 mA in terms of power..) so
you might want to change the primary L and C a bit to match your
transformer, while keeping the resonant frequency in the same
ballpark... (bigger L, smaller C)
_______________________________________________

Thanks Jim, for the friendly comment. Concur about the 3-pipe gap. But to 
match the cap to the NST, in direction resonant or LTR, i would need to make 
it bigger, not smaller. The cap is STR, and the NST would be able to charge 
a much bigger cap. But there i had to make a compromise, in order not to 
obtain a smaller than 1 turn primary. Or did I misunderstand you, and you 
had something different in mind, as a matching goal?

Kurt 

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