Re: Sealing Secondary Coil

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

Original poster: "marcus  conner" <connerelectric-at-hbeark-dot-com> 

  ac 43 is a good air dry varnish it has a dielect of2000 v  /mil there is 
a bc340 that has a dielect of 4100  v/mil it has to be baked at 275 degrees 
for 3hrs  will your form take the heat  ?

-------Original Message-------

From: Tesla list
Date: Friday, February 20, 2004 14:57:27
To: tesla-at-pupman-dot-com
Subject: Re: Sealing Secondary Coil

Original poster: "Harold Weiss" <hweiss-at-new.rr-dot-com>

Hi JC,

Polyurathane will work, but can become brittle and crack later on. Dr. R
uses Glyptal (1201 red I think) to seal the tube, and Dolph's AC-43 varnish
to seal the windings. The AC-43 is an actual transformer winding varnish.

David E Weiss

   > Original poster: JOSEPH CACCIATORE <jocatch-at-us.ibm-dot-com>
   >
   >
   > Got my 2000' spool of #28 wire last night and wound my secondary (20"
long)
   > on a 4" diameter PVC pipe 23" long. Now the question is what's the best
   > stuff to seal and protect it?
   >
   > Alot of people use regular varnish I assume which has to be painted on
with
   > a brush x times. Besides having a nice thick coating, any other advantages
   > to varnish? What about spray paint, the clear poly urethane stuff? It
would
   > be nice and neat and able to fill the cracks OK but is it good for high
   > voltage? Any other stuff used to seal a coil on PVC?
   >
   > JC