Re: Repairing NST's do not use solvent

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: gary350@xxxxxxxxxxxxx 

Do NOT put the NST's in any solvent.  Put them in your kitchen oven for 
about at hour at  200 deg.  Check to see if the tar has melted the olded 
the tar is the higher the temperature needs to be to make it melt.   Turn 
the heat up about 25 degrees every 30 minutes until the tar melts.   If you 
do not over heat the tar it will not smoke or make a bad smell in the house.

When the tar melts you have 3 choices.

One choice is to shake the NST back and forth a few times to stir the old 
tar around and then let it cool.  99% of the time this will fix the 
problem.   Once the NST arcs through the old tar is makes a carbon track in 
the tar that will arc again that is why they stop working.   Once you get 
rid of the bad place in the tar it will work fine again.

The second choice is pour out the hot tar and mix it with about 40% high 
voltage transformer oil and then pour it back into the NST case.   This 
makes the NST much stronger than before.

Third choice it to remove the NST from the case, remove some shunts, put 
the transformer in a contrainer of HV oil and it is then almost 
indistructable.   I usually remove enough shunts on my NST's to double the 
power output the HV oil acts like a cooling system and they work fine.

Gary Weaver




-----Original Message-----
From: Tesla list <tesla@xxxxxxxxxx>
Sent: Jul 6, 2005 8:23 PM
To: tesla@xxxxxxxxxx
Subject: Repairing NST's

Original poster: "Mike Knowlton" <amdx@xxxxxxxxxxx>

I have 4 nonworking NST's that I would like to repair.
3 - 12kv @ 30ma and a 9kv @ 30ma

What is the best solvent to use to disolve the tar?

I'm thinking about putting them all in a bucket and
letting them soak for a few days. (weeks?)

                                               Mike