Re: Coil Form needed 2

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

Original poster: robert & june heidlebaugh <rheidlebaugh-at-desertgate-dot-com> 

Harold I have PVC pipe coil forms up to 1.5 in thick and diameters up to 40
in and thus farr I have never seen foam cored. I have seen one case of mixed
plastic like it was made of reclaimed plastic with a solid overcoat, but I
did not buy that.
      Robert   H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Tue, 18 May 2004 15:50:31 -0600
 > To: tesla-at-pupman-dot-com
 > Subject: Re: Coil Form needed 2
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Tue, 18 May 2004 16:13:20 -0600
 >
 > 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.
 >>
 >>
 >>
 >
 >