Re: NST vs MOV vs Pole Pig

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

Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>" <srward16-at-hotmail-dot-com>

Hey,

If youre like me, you can get 2000+VA for free:))  If there are any local 
sign shops, ask for the dead transformers.  And ask if they will let you 
have as many as you want.  Then ask to be able to pick them out of the pile. 
  Look for the FRANCE transformers.  These are the easiest to rebuild.  My 
marge coil is throwing 5 footers from a 2 x 15000v 60ma PSU.  When i recieve 
my PFC caps, i will consider shunt removal for possibly like a 200ma output 
total;)  So go around to the local (or not so local in my case) sign shops 
and look for some dead or just thrown out NSTs.   Also, they last much 
longer when unpotted, since there is no tar to arc through.  I lucked out 
that both of my 15000/60 transformers simply needed the tar removed, then 
worked perfectly!  But you may need 2 transformers to get 1, since you may 
find a shorted or opened secondary.  So look for lots of the same 
transformers.  What magnitude of power are you looking for??  I would think 
that 3 beefy NSTs could supply 3.5KVA if rebuilt and de-shunted.  The 60ma 
units are great!  They never heat up, and have over built parts for 
everything, since they are made to run for a very long time.  Of course they 
will overheat if you take out too many sunts.  You can seriously do this all 
for free.  I used the original mica for insulation, and i removed the tar 
with a screwdriver to chip it away.  If you want to email me off list with 
some specific questions, feel free.

Steve Ward.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: NST vs MOV vs Pole Pig
>Date: Sun, 18 Aug 2002 23:05:10 -0600
>
>Original poster: "Mudford, Chris by way of Terry Fritz 
><twftesla-at-qwest-dot-net>" <chris.mudford-at-agresearch.co.nz>
>
>Understanding the differences, advantages, and disadvantages of each,
>I'm after a diffinitive answer (if there can be one).
>
>Using NST's with Terry's filter and a safety gap across the capacitor,
>are the NST's going to last many hours of service?  If not I'm better to
>put the cost of the NST's and the filter into building current limiting
>ballast and one of the other options.
>
>This game would be a lot easier without a constricted budget.
>
>Cheers, Chris.