Re: Toroid Construction - Need something good . . .

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

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
> 
> Original poster: "Allanh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<allanh-at-starband-dot-net>
> 
> It doesn't matter what metal is used for the top load, as long as it is a
> solid piece, no hole in the middle, which would form a single shorted turn
> and sink lots of current.

A hole in the middle doesn't make any difference. A shorted turn at that
place, with very little series resistance, just changes slightly the
secondary inductance, without adding significant losses.

By the way, I am making a toroid by gluing a stack of thin plywood 
disks cut to calculated sizes. I will cover the resulting toroid, 
after finishing its surface (without a hole in the middle) with 
aluminum tape, or maybe I will use it as a form for metal spinning.

I was using e-tesla6 to calculate the required size for this toroid,
but noticed that it assumes a toroid with a hole. Some simple trick
to make it consider a holeless toroid?

Antonio Carlos M. de Queiroz