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Re: Perfect primary?
Original poster: "Peter Lawrence by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Peter.Lawrence-at-Sun-dot-com>
I have made many primaries, here's my trick. Straighten the wire as others
have suggested, then wind it on a tube about the size of your spiral, then -
and this is the important part - get the wire to lay down in a smooth spiral
before threading it through the supports. Then don't thread the wire through
the supports, rather hold the wire in one position and thread the supports
onto it. Start from the outermost turn of the spiral and with what will
become the innermost hole in the support. You won't be able to bend the wire
that has already been threaded through the supports, so it must have already
been bent correctly before starting. Having the supports nailed down to a
board and then trying to thread wire through it will never work either. After
you've got about two or three turns threaded throught the supports you have
to adjust the outer diameter to be exactly what you want in the end, after the
first couple of turns it becomes impossible to alter the overall diameter.
>Try this: Lay the wire out in a straight line. Then attach one end to a
>bench vice or such. Somehow, with a lever or come-along, pull the other end
>to stretch the wire a bit. This will give you a perfectly straight,
>unkinked wire. Then carefully wind it around a round form about the
>diameter of the middle of your primary form. Finally, carefully insert the
>wire into your primary supports. Hopefully, your supports are slotted so
>you don't have to run the wire through a bunch of holes.
>----- Original Message -----
>From: "Tesla list" <tesla-at-pupman-dot-com>
>Sent: Thursday, May 10, 2001 5:47 AM
>Subject: Perfect primary?
>> 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