Re: Primary windings

["Jason Johnson" <hvjjohnson13-at-hotmail-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, August 09, 2000 2:00 PM
Subject: Re: Primary windings


> Original poster: "Kelly & Phillipa Williams" <kellyw-at-ihug.co.nz>
>
> Hi experienced ones,
>
> (I am in the process of building a TC.) I have two 15 kV 30mA NST's as a
> power source
> and I am wondering if I can use copper tubing of OD 3/16 ths of an inch
for
> the primary coil
> in the from of an inverse conical spiral. Is this too large?

3/16" is fine

>
> Also, what is a good cheap source for secondary coil windings? I have both
> the primary
> and secondary windings from microwave oven transformers available as a
> possible source,
> are either of these suitable?

I suppose it would be possible to use them but IMHO it would be a big pain
in the -at-#$. I tried winding a small coil with magnet wire salvaged from the
back of a TV once. The varnish already on the wire wasn't terrible but the
wire kinked up and broke several times, and I got some splinter-like things
froms the varnish breaking into shards as I pulled the wire off the form.
Never again. It is easier and well worth the little bit of time it takes to
call around to electric motor repair shops (look in the yellow pages or an
online directory) and ask them about their leftover wire (they get big 80 lb
spools and if there is a pound or two left over they don't mind selling it)
and then buy it for the price of scrap copper. If you just need wire one
time and don't mind paying a little bit (around 20$) you can order a one
pound (depends on how much you need) spool from places like mouser
electronics, allied electronics etc.

Jason Johnson

> Thanks heaps,
>
> Alan Williams. (kellyw-at-ihug.co.nz)
>
>
>
>