RE: NST blown

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

Original poster: "Paul Marshall" <klugmann-at-hotmail-dot-com> 

Dan,
  This has probably happened to everyone on the list at one time or 
another. Usually NST's fail because of voltage spikes or RF feed back which 
in turn causes a short to the case. When this happens one side of the 
transformer will be hot and the other side dead. It's very common. They can 
be fixed, but it's hardly worth the effort.


Paul S. Marshall





>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: NST blown
>Date: Wed, 28 Jan 2004 08:13:49 -0700
>
>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
>