Re: Best, easy way to protect NST?

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

Original poster: "Jack Vandam" <snotoir7674g-at-mindspring-dot-com> 

Hi Greg and Gerry,

Thanks a lot for the info and schematic links.  That gives me plenty of info
to build the necessary circuit should I decide to.  With what I perceive as
Neon transformers becoming rarer these days without paying much higher cost,
it's probably not going to hurt me to use one of these protection circuits.

Thanks again,
Jack

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, October 05, 2004 9:36 AM
Subject: Re: Best, easy way to protect NST?


 > 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
 >  >
 >  >
 >
 >