Re: NST blown

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


When running NST's, which are not made to provide continuous HV, you always
should use a complete filter system, commonly called a "Terry Filter".
Terry's filter provides several stages of protection including resistance
(to spoil the Q factor), spark gaps, capacitors, and MOV's.  Less than this
and you will keep blowing those expensive and now getting scarce NST's.

Perhaps Terry can put up his schematic again.  It's a great filter and will
help you save those NST's.

http://hot-streamer-dot-com/TeslaCoils/Misc/NSTFilt.jpg

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
 >
 > 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,