Re: Pre-Treatment for Sonotubes for Secondary Coils? ? ?

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

Original poster: "D.C. Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


Three coats Glyptal or Dolph's ER-41 both inside and outside and you are
ready to wind.  The Glyptal seals the tube against atmospheric moisture,
which, if absorbed by the tube, will cause the "release" agent to activate
and the tube swells and upspirals.  The release agent is incorporated into
the tube for their intended purpose --- releasing when soaks with water
after the concrete has set up.  These insulations are much better dielectric
than polyurethane and they don't crack or flake as time goes by.

Dr. Resonance




----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, September 06, 2002 3:11 PM
Subject: Pre-Treatment for Sonotubes for Secondary Coils? ? ?


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<dhmccauley-at-spacecatlighting-dot-com>
>
> I'm planning winding my next secondary coil on a Quicktube (Sonotube).
The
> tube is 10 inch in diameter, made of cardboard, and coated on the inside.
I
> see that a lot of people have been using these tubes (including Ed
Wingate)
> and was wondering what type, if any, preparations are made prior to
winding
> these things.  (Should I coat with polyurethane etc...)
>
> Thanks again.
>
> "Captain Corona"
>
>
>
>