Re: 4 inch coil

• To: tesla-at-pupman-dot-com
• Subject: Re: 4 inch coil
• From: FutureT-at-aol-dot-com (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Mon, 19 Apr 1999 19:02:43 -0600
• Approved: twf-at-verinet-dot-com

In a message dated 99-04-19 09:33:09 EDT, you write:

<< Hi all,
>  I am presently putting my first coil together. Actually this is my 2nd.
> secondary. I started to do a 2 1/2 in. secondary but changed my mind and
> have decided to go with a 4 in. I plan to wind it 20 inches tall with 24 ga.
> wire. The primary will be 4 ga. solid copper wire. It will have an 11 inch
> inside diameter with 1/4 in. spacing, and a total outside diameter of 19.14
> inches. The cap for the primary tank circuit will be about .0029 mf. The
> toroid will be 4 in. aluminum flex tubing. Diameter yet to be determined. I
> will be using a 15 KV-at-30 ma. NST.  I am building one of Richard Quicks'
> cylinder spark gaps. Am using 1 in. copper pipe with .028 gap spacing. there
> will be 13  pipes -at- 4in. long.
>    Any comments on whether this thing will work??? Any and all coments
> welcome.
> Thanx
> George   Stein >>

George,

Assuming you have enough primary turns to tune it, (I didn't do any
calcs), it should give 17" sparks using the best sized toroid,
and max gap spacings.  (warning, wide gap spacings are hazardous
to the life of your NST).

Happy coiling,
John Freau

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