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Re: Charging Inductor Construction (fwd)



---------- Forwarded message ----------
Date: Thu, 25 Oct 2007 20:15:18 -0500
From: David Dean <deano@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Charging Inductor Construction (fwd)

On Thursday 25 October 2007 08:44:25 am you wrote:
> ---------- Forwarded message ----------
> Date: Wed, 24 Oct 2007 21:52:14 -0500
> From: Crispy <crispy@xxxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Subject: Charging Inductor Construction
>
> Hello,
>
> I've been working on the pulsed DTSG coil, and have finished the spark
> gap, tank capacitor, de-Qing diode, and power supply.  The next thing to
> make is the charging inductor, but I'm not sure what the best way to do
> it is.  I need an inductor of anywhere between 25mH and 50mH that is
> able to withstand 20kV across the terminals.  Single-layer air core
> inductors of that value would have to be pretty big, and multilayer
> inductors could arc between the layers.  Does anyone have any
> suggestions on how to do this easily?  Also, if there are suitable
> inductors which I can purchase, that works just as well.
>
> Thanks,
> Crispy

Hi Crispy

Perhaps 20 to 30 flat spiral coils, of about 100 turns each, of 24 to 28 AWG 
magnet wire in series on a common core. Approx. 2 inch I.D. and 4 inch O.D. 
for each coil and spaced 1/4 inch apart for a 4 inch O.D. by 8 to 10 inch 
long package would do the trick. 

later
deano