Secondary spacing for my large coil...and others

• To: tesla-at-pupman-dot-com
• Subject: Secondary spacing for my large coil...and others
• From: Clay Wilson <gasman-at-althea.a-line-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Thu, 15 Oct 1998 21:47:01 -0600
• Approved: terryf-at-verinet-dot-com

	D.C., all:

	Thanks for suggestions - I've seen a bit of discussion in past few 
months about coupling, 'raising the secondary,' and maximizing spark
output without overcoupling and consequently damaging the sec'y.  However,
it is intuitively critical that the *horizontal* distance between the primary
and secondary be maximized as well.  I haven't seen any suggestions on this
topic.

	Any contributions, folks?  My 16", 10 kW coil is coming along...
and soon I'm gonna have to decide how far to make the first primary turn
from the secondary.  I'll be using 3/8" or 1/2" copper tubing in a flat
spiral.  Coil about 60" tall, about 800 t. of #14 wire, 10 kVA 24 kV supply,
cap about .05 to .1 uF ( haven't bought one yet.)

	Thx.
						Clay.



> Original Poster: "D.C. Cox" <DR.RESONANCE-at-next-wave-dot-net> 
> 
> Nice post with clean, clear data.  Your 1" sec elevation is very close to
> my usual recommendations of 1 to 1 1/2 inches above the plane of the pri
> coil for bottom turn of sec coil.  Any coiler running a 20 to 24 inch dia
> coil will find 7 to 9 inch elevation of sec coil above the primary plane
> works best.

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