Re: Coil Form needed 2

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

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.
 >
 >
 >