Re: Toroid Building

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: robert heidlebaugh <rheidlebaugh@xxxxxxxxxxxxxx>

Gary.     I use ducting that way. I use 2 Pie pan or pitza pan center and
join the ends by flatening 1" of one end and crinping the flatened end like
a stove pipe. I then push the ends together to form a toroid and spot epoxi
the joint so I have a metal to metal contact not insulated by epoxi. I use
brass 1/8" lamp pipe to hold the assembly together  with 2 nuts ,and provide
a 1/4 inch center hole for mounting to my secondary. I do not streach the
ducting or use tape, The toroids work just fine.  Quick to assemble
         Robert   H
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> From: "Tesla list" <tesla@xxxxxxxxxx>
> Date: Fri, 19 Aug 2005 08:55:45 -0600
> To: tesla@xxxxxxxxxx
> Subject: Toroid Building
> Resent-From: tesla@xxxxxxxxxx
> Resent-Date: Fri, 19 Aug 2005 08:57:03 -0600 (MDT)
>
> Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
>
> Hi All,
>
> I'm in the process of making a 8x32 inch toroid using the heavy
> ducting from McMaster-Carr
>
> I have the toroid formed (ends attached) and I plan to mount an AL
> disc in the center with a little RTV.  I want to fill the
> corrigations with something that can be easily sanded to make
> smooth.  I am planning on using PLASTER_of_PARIS for this purpose
> (done after the center disc is mounted for rigidity).  After sanding
> smooth, I plan on sealing the plaster with a varnish and then adding
> AL tape starting and terminating on the AL disc.
>
> Does anyone see a problem with using the plaster??  Grout is maybe
> another choice for a filler. Ideas welcomed.
>
> Gerry R.
>
>