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Re: Primary construction
to: Mark
Use white delrin (acetal resin) instead of acrylic for your primary supports
if you are working with simple hand tools. It's much more forgiving to
drill and has less tendency to crack like acrylic does.
Regards,
Dr.Resonance
-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Tuesday, August 10, 1999 4:37 PM
Subject: Re: Primary construction
>Original Poster: Mark Finnis <mefinnis-at-medicine.adelaide.edu.au>
>
>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
>
>
>
>__________________________________________________________
>
>Tesla Home Page: http://www.adelaide-dot-net.au/~mefinnis
>__________________________________________________________
>
>