Re: primary coil spacing

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Esondrmn-at-aol-dot-com>

In a message dated 3/11/01 12:14:23 PM Pacific Standard Time, 
tesla-at-pupman-dot-com writes:

<< Original poster: "hoggwild89 by way of Terry Fritz <twftesla-at-uswest-dot-net>" 
<hoggwild89-at-netzero-dot-net>
 
 I am planning a flat coil, using 1/4 inch copper tubing. I want 15 turns with
 .75 inch space between each turn measured edge to edge (or 1 inch center to
 center).
 Sound OK ????????
  >>

It depends on the voltage of your primary power supply.  Your design will 
work but results in a much larger diameter than is necessary.  I prefer to 
use .350" spacing between turns, to allow room for a primary tap, and to go 
with 15 or so turns. .75" spacing would only be required if your primary 
voltage was very high - as in well above 15 kv.

Ed Sonderman