Re: Best, easy way to protect NST?

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

Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net> 

I think RF chokes have been shown to cause problems.  You may want to look
at the Terry filter instead.  A string of MOV's from each bushing to NST
ground (chassis), with a string of caps in parallel with each MOV string,
and 1Kohm 100W resister betwen each bushing and the safety gap.  For a 15KV
NST, use 8 1800V MOVs in a string and 8  0.047uf 1600V caps in a string.
Digikey has the parts.  I changed the cap value to 0.047uf from Terry's
original schematic and increased the number for higher voltage ratings.
Probably can find a link to Terry's schematic in the archieves that also has
digikey part numbers on it.

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

Gerry R.

 > Original poster: "Jack Vandam" <snotoir7674g-at-mindspring-dot-com>
 >
 > Around the web, I've noticed various coilers placing small, rf chokes on
the
 > output of their neon xformers.  Since I'm throwing together a coil later
 > this week, I'm curious if there is any specific formula for these chokes
as
 > I'd like to add some protection to the NST I'll be using.  Also, how
 > effective is the protection offered by these chokes?
 >
 > Thanks,
 > Jack
 >
 >