Re: Coil Form needed 2

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

Original poster: "bill wilson" <wtw-at-tampabay.rr-dot-com> 

foam core pvc comes in all sizes. you want to make sure you get schedule 40
pvc pipe for pressure. foam core pipe is not pressure rated you do not want
to use foam core pipe
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, May 18, 2004 5:50 PM
Subject: Re: Coil Form needed 2


 > Original poster: "Harold Weiss" <hweiss-at-new.rr-dot-com>
 >
 > Hi All,
 >
 > When looking for PVC pipe for a TC, make sure it's the solid PVC and not
the
 > foam core.  I'm starting to see lots of the foamcore crap.   That stuff
 > punctures easily at TC voltages, and baffles wouldn't stop it from arcing
 > the inside of the secondary.  It will arc thru the foam layer.  It is a
 > pretty display until the main track burns in.
 >
 > David E Weiss
 >
 >
 >
 >  > I wouldn't be surprised if the larger sizes of pipe have nonuniform
 > plastic
 >  > in the wall.  I was turning some white PVC pipe (4"_ on a lathe and
 >  > discovered that only the outer layer was actually white, and the inside
 > was
 >  > sort of grayish.
 >  >
 >  > I don't know how they make the stuff (extrusion probably), but it's
 > entirely
 >  > possible that they extrude a "nice clean" layer on inside and outside
of
 > the
 >  > pipe.
 >  >
 >  > For what it's worth, if you look at ABS DWV (the black stuff used for
 >  > sewers), you'll see that it's actually a foam in the middle of the pipe
 >  > wall.
 >  >
 >  >
 >  >
 >
 >
 >