RE: Secondary form idea?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>

Think it through - would a piece of foam be structurally sound enough to
wind with wire under tension without compressing?  How would you fasten
the tube to the base and top load?  Sounds terribly fragile!

Don't overlook the obvious solution that everyone else uses - PVC pipe.
There's nothing to be gained by using anything else.  Some may have
suggested that PVC is lossy - but it is not in any significant way.

Gary Lau
MA, USA


> Original poster: Chris Estes <estescc@xxxxxxxxxxxx>
>
> Trying to find a sturdy form for my secondary in the hardware store I
> came across this stuff. Its that tubular foam pipe insulation one uses
> to keep pipes from freezing. The box says it's made of polyethylene,
> its O.D. is about 2" and I.D. is 1". It's kind of spongy but I don't
> think it could absorb much water and seems fairly clean. I think if I
> put several coats of polyurethane on it, wind it, and then coat some
> more it'll make a good secondary. Anyone have any notes to give on
> something like this?
>