Re: NST blown

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net> 

Probably carbon tracking in the tar potting, try heating it up in an oven.

Regards - Jim Mitchell
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, January 28, 2004 10:13 AM
Subject: NST blown


 > Original poster: Bob81818-at-aol-dot-com
 >
 > Hi all, I was demonstrating my first coil at school and after running it
 > for a few minutes (not continuously) the spark gap stopped firing after
 > taking it home the secondary of the 9/30 nst had no conductivity, so I
just
 > implied that it destroyed itself. I plugged it in to double check and I
got
 > less than millimeter sparks when I scraped a wire over the two secondary
 > electrodes. That kinda puzzled me a bit, would appreciate if someone could
 > explain how that happened if the sec is blown. And I was also wondering if
 > its possible to fix an nst like this. I'm not surprised that I blew the
 > xformer cuz I didn't ground the tank circuit, or put in a safety gap, I
 > guess I just wanted to know if the coil would work before I added all the
 > safety stuff, therefore I accept that I am an idiot. A little advise on
 > this subject would be nice.
 >         Thanks all,
 >               Dan
 >