Re: Sealing Secondary Coil

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

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
 >
 >
 >