Re: secondary coil form materials

["Luc" <ludev-at-videotron.ca> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi all

I find a piece of 4.5" pipe in polypropylene from Orion this pipe is brown and
whit out fire retarding agent ,Orion make these pipe for chemical plan. I'll
try to make a coil with it .

The only question is how polyurethane will adhere to polyprop.

Luc Benard(Montreal)

Tesla list wrote:

> Original poster: "John Morawa" <morawaj-at-interaccess-dot-com>
>
> Hello everyone,
>
> Can anyone recommend a material for secondaries coils?  Something that can
> be found in a 4"-6" diameter.  Normally I use PVC but I understand that it's
> RF qualities are not that great.  Of the two which would be better, acrylic
> or polyethylene?  Or is there something that is similar in $ but better for
> secondaries?  Also, for a coil of that diameter, what is the minimum wall
> thickness to keep it rigid enough to wind.  Is 3/16" ok or is that too thin
> or thick?
>
> Thanks for any comments,
> John M.