Re: Primary construction

To: tesla-at-pupman-dot-com
Subject: Re: Primary construction
From: Mark Finnis <mefinnis-at-medicine.adelaide.edu.au> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Tue, 10 Aug 1999 06:37:17 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

At 10:42  08/08/1999 -0600, Daniel wrote:

>I don't have a drill press or a table saw, anything I
>build is done with a hand held drill and a circular saw so obviously it's
>going to be rather hard for me to get the holes drilled with anything near
>precision and then trying to cut along the holes would be next to impossible
>to do without ruining the entire structure, any suggestions or alternate
>ideas?

I made my first primary with nothing but hand-tools.

         http://www.adelaide-dot-net.au/~mefinnis/images/coil_main3.jpg

The primary is simply lying flat on a piece of acrylic and has 'spacers' on 
45 degree radials to separate the turns.  These were cut from straight 
pieces of acrylic and glued to the base using a piece of copper pipe as a 
gauge.

I used a similar technique for the larger coil (though I will probably 
re-build this !).  Using radial batons with holes drilled for pre-cut 
pieces of dowel (you can buy these in any hardware store).

         http://www.adelaide-dot-net.au/~mefinnis/images/coil2_build3.jpg

This works but is not really "up to standard", so I plan on returning to my 
love of plastics and using some HDPE which I can get in 12-15mm sheets.

cheers

mark

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Tesla Home Page:   http://www.adelaide-dot-net.au/~mefinnis
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