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Re: Perfect primary?

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-uswest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> Original poster: "acmnovak by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> Hello All,
> I'm working on a couple small coils this week which use #6 wire as the
> primary conductor. Could someone please tell me how to get a really nice
> looking coil without sags or uneven spaces?
> I've got six supports cut out of UHMW-PE which hold the turns .2" apart...
> However, the rest of the coil looks kinda shabby so far.
> Any help would be greatly appreciated!
> -Mike Novak

1. Stretch the wire until it is straight and slightly work hardened.  #6
is pretty big, but I have done stretching by attaching the wire to the
bumper of the car and backing it a little bit.

2. Find a form somewhat smaller than the coil you want to end up with. 
Some experimentation helps here.

3. Wind the wire onto the smaller form.  Assuming the resultant coil
comes of slightly smaller that your form, you can just slip it over the
formers carefully and have a very neat looking coil.  I've done it many
times with neat-looking results.