Re: New Secondary

["Tesla list" <tesla@pupman.com>]

Original poster: "by way of Terry Fritz <twftesla@uswest.net>" <Esondrmn@aol.com>

In a message dated 12/12/00 4:14:57 PM Pacific Standard Time, 
tesla@pupman.com writes:

- snip -
<<  >>
 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
 
  >>
I fired up the new, re-wound, secondary last night.  This is with the old set 
up that I have used for a year or two with this coil, .009 ufd cap and static 
gap - except the first primary turn is removed and the secondary is spaced up 
so there is about one inch between the top level of the primary and the first 
turn of the secondary - very loose coupling.

Things are different.  It doesn't perform quite like it did before.  It tries 
to emit sparks from the top winding on the secondary, only when I am running 
up the power, not at full power.  The lower toroid is one inch above the top 
winding on the secondary which has always prevented breakout there in the 
past.  I am also getting occasional sparks from the last turn of the primary 
to the strike rail, which is about one inch above it.  This is something I 
did not have happening before.

Overall, the sparks are only about three inches less than before (23" now as 
opposed to 26" before).  I would have expected much less with the real loose 
coupling.  Now I will try lowering the secondary and see if these new 
problems go away or get worse.

Ed Sonderman