Re: New Secondary

["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 12/11/00 3:34:06 PM Pacific Standard Time, 
tesla-at-pupman-dot-com writes:

<< 
 Well, I re-wound my 3.0" secondary this weekend.  I used # 28 wire again and 
 used the same winding length of 13".  I finished it with some clear two part 
 epoxy material that is sold for making clear counter tops.  Similar to Behr 
 build 50, I believe.  I have to agree with all of you that have commented on 
 this stuff.  It goes on thick with one coat and dries clear.  Looks very 
good 
 and definitely thicker than 10 or 20 coats of polyurethane.  I do have lots 
 of small air bubbles in the dried material that I could not get out, but I 
 think it is ok.
 
 Ed Sonderman
  >>
As I was re-mounting the secondary last night, I realized the clearance from 
the secondary to the primary was less than ideal.  It was actually only one 
inch.  This may account for the sparks that destroyed it.  Still, they arced 
from three to four inches up on the secondary down to the primary.  Maybe I 
had enough clearance for the previously low power set up but not enough for 
the sync rotary at 120 bps and a large cap (.032 ufd).  I removed the 
innermost turn of the primary and increased the clearance to about 1.5" 
minimum.

Ed Sonderman