Re: Coupling question

["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 12/12/00 5:48:56 PM Pacific Standard Time, 
tesla-at-pupman-dot-com writes:

<< Original poster: "Corey May by way of Terry Fritz <twftesla-at-uswest-dot-net>" 
<cbmay-at-home-dot-com>
 
 Hello, I was wondering if a primary coil that is made of 1/4 copper tubing
 spaced 1/4 apart on a 15 degree angle with ten turns(10 is my favourite 
number)
 is a good primary for a system ranging between 60ma to 150ma at 15kv? Would
 this also have good enough coupling or not enough coupling?
  
 Thanks for your time!
 Corey
  >>
Corey,

Your primary as described would probably work fine.  Based on my experiences, 
I would suggest winding it flat as opposed to at 15 degrees.  With a flat 
primary you can get all the coupling you need and it helps increase the 
distance between the toroid and primary thus helping eliminate strikes down 
into the primary.  I would add more turns, like 14 minimum.  This will allow 
a larger tuning range which you will find helpful in the future.  I would 
also increase the spacing between turns to .350.  This is just my favorite 
number.  I find it allows more room for the tap clip to fit in between 
windings.

Ed Sonderman