RE: Skeleton coil forms, Big coil update

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Oxandale, Terry by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Toxandale-at-SPP-dot-org>

It was not a skeleton form, but I used 30lb fishing line as my spacer (and
left it on the form when done). It's cheap and plentiful, and if you need
closer spacing, then go with the 25 or 20 lb.

(un)Terry

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, June 13, 2001 8:31 AM
To: tesla-at-pupman-dot-com
Subject: Re: Skeleton coil forms, Big coil update


Original poster: "brian by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<ka1bbg1-at-mcttelecom-dot-com>

Hi, two things came to mind here, first you could find a string about the
same size as the wire, and the skeliton frame i built years ago i just gave
it a coat of urethane and forgot about it. i have seen coils built where
they dusted it with fibre glass(tiger hair) to help fill in between.cul
brian f.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, June 12, 2001 8:55 PM
Subject: Skeleton coil forms, Big coil update


> Original poster: "Jason Johnson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <hvjjohnson13-at-hotmail-dot-com>
>
> I was thinking about the construction of my BIG coil (June 2nd, Few
questions
> about large coils), and about a comment about my planned secondary of
12"x54"
> close wound w/ 21 guage magnet wire, was way to small for 17 KVA, and it
hit
> me- you can make a secondary twice as big with the same amount of wire if
you
> double the wire spacing (this should have been obvious earlier but oh
well). So
> I'm now thinking about building a 14" x 100" secondary on a skeleton form
with
> with 21 guage magnet wire and with the spacing equal to the wire diameter,
Now
> this is easy enough, I just wind two wires on and take one off after I'm
done
> (I have three 14lb spools of 21 guage magnet wire but I need two for other
> projects). But the problem is now how do I coat it? half of the surface of
the
> secodnary is going to be open with nothing underneath it. Do I need to
coat it?
> I know from personal experience that magnet wire under tension with
nothing to
> hold it (like polyureathane) does stretch over time and may become loose
on the
> form, but I have no Idea how much 21 guage wire stretches (or even if it
will
> at all, all my other stuff is finer than this). How many other people have
> built large secondaries on skeleton forms?
>
>
>
>