Re: Primary

[Esondrmn-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

In a message dated 8/27/00 11:46:56 PM Pacific Daylight Time, 
tesla-at-pupman-dot-com writes:

<< Coilers,
 
 I am designing my second coil.  I am using a 6.625" x 26.5" secondary and 
 15,000v 120 ma worth of NST's. I am going to use 1/4" copper tubing for the 
 primary (probably 15 degrees or so incline). I want to get a nice tightly 
 coupled system, I was planning on about 9.5" inside diameter for the 
 primary. I don't want to re-wind the same piece of copper 3 times in order 
 to peak the system. So I was hoping someone else who has a 6" coil could 
 tell me the inside diameter of their primary coil.
 
 Thanks in advance,
 
 Dan
  >>
Dan,

My 6" secondary uses a 14 turn primary made of 3/8" copper tubing with 3/8" 
spacing between turns.  I originally made a 20 degree inlcined primary and 
later rebuilt it into a flat primary.  Works as well or better and helps to 
avoid strikes down to the primary.  I would definitely advocate flat.  I use 
an 8" inside diameter.  The first turn of the secondary is just level with 
the top surface of the primary.

Ed Sonderman