RE: PVC Wire for a secondary?

["Richard Barton" <richardbarton-at-caving5.freeserve.co.uk> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

I joined my single strand enamelled copper by overlapping for around 1/2
inch (after sanding
off this length to remove the enamel), and then soldering along the whole
overlap.
I didn't twist the wires toegether, simply laid them straight against each
other.
Then I slid around an inch of heat-shrink-wrap sleeving over the join and
shrunk on.
This join naturally came only halfway up the secondary and I was not
troubled by
any breakouts. A similar join could be made with stranded wire. The stripped
ends could be pushed together and soldered. The resultant thickened joint
could
then be ground back to the original thickness with a como mini-drill
grinding head,
and a heat-shrink sleeve slid on.
						Richard Barton.

-----Original Message-----
From: Tesla List [mailto:tesla-at-pupman-dot-com]
Sent: Saturday, June 10, 2000 9:50 PM
To: tesla-at-pupman-dot-com
Subject: Re: PVC Wire for a secondary?


Original Poster: "Finn Hammer" <f-hammer-at-post5.tele.dk>

Ed!

I have been contemplating trying this for some time, but put it off, due
to uncertainty about how to make a good splice, where the 2 wires meet.
The coil I had in mind would need more than one reel of wire.

What do you do to the joint, after soldering the wires together, to stop
breakout from that spot.

Or maby that is not a problem at all.

Any guidance would be appreciated.

The method has advantages, such as automatic spacewind, and the ability
to colour match the secondary to the rest of the structure, I`d like
that!

Cheers, Finn Hammer

Tesla List wrote:
>
> Original Poster: "Edward Wingate" <ewing7-at-rochester.rr-dot-com>
>
> Tesla List wrote:
>
> > Original Poster: "David Mills" <dave-at-g7uvw.freeserve.co.uk>
> >
> > Hi all,
> >
> > Are there any major disadvantages in using PVC covered wire for a
> > secondary.
> >
> > The only problem I can forsee is that the capaciance of the secondary
> > will be altered due to the thicker wire insulation spacing the turns out
> > more.
> >
> > Any ideas / anyone done this?
> >
> > Cheers
> >
> > Dave
>
> Dave,
>
> I have used PVC covered machine tool wire MTW/THHN/TFFN with outer vinyl
> jacket for several large coils including my Twin Coil and it works fine.
It
> is available in spools up to 2500 feet at almost any large commercial
> electrical contractor supply place. The price varies with the current
price
> of copper, but is always very reasonable IMHO.
>
> My Twin Coil can be seen at:
>
> http://users.deltanet-dot-com/users/stcole/public_html/hv/wingate.html
>
> and
>
> ftp://nic.funet.fi/pub/sci/electrical/tesla/pictures/wingate/wingate2.jpg
>
> Safe coiling,
>
> Ed Wingate RATCB