Re: 4 inch coil

• To: tesla-at-pupman-dot-com
• Subject: Re: 4 inch coil
• From: Esondrmn-at-aol-dot-com (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Thu, 22 Apr 1999 22:13:31 -0600
• Approved: twf-at-verinet-dot-com

In a message dated 4/19/99 6:33:09 AM Pacific Daylight Time, tesla-at-pupman-dot-com 
writes:

> 
>  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,

Sounds like a good project.  I would build the primary with an inside 
diameter of 7.0" maximum.  You do not need any more clearance than that and 
making if larger will just reduce coupling.  I would also wind it with 3/8" 
spacing to allow room to get the tap lead in between windings.

Ed Sonderman

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