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Re: Aluminium Magnet Wire for Secondary

Original poster: Karl Lindheimer <karl@xxxxxxxxxxxxxxx>

Hi Paul,

It sounds as if you got a "bad" roll of wire.  I have not had any
problems with magnet wire I buy from standard electronic suppliers,
however, you will pay more.


On Apr 23, 2005, at 10:24 AM, Tesla list wrote:

Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>

OK, magnet wire. I bought 3 lbs. of 26 AWG magnet wire on E-Bay. It
was advertised as high temperature wire. When I started winding the
coil, I noticed that every so often, I would feel a small bump, as if
the insulation (varnish or whatever) had formed a little run or
something. I checked with my mini microscope and sure enough, it is a
small bump of varnish. Is this common with magnet wire? I don't
remember running across this with wire I have salvaged from motors and
such and they all tend to have small bends in them from where they
were wound in the motor. Also, my son, who has incredibly sharp
eyesight, said he saw a spot without any insulation. Sure enough, when
I looked with the microscope, there was a tiny spot of bare copper
about the size of the end of a pencil lead. Did I get a supply of wire
that was a "second" or failed quality control or something like this?
It was advertised as new. It was also one of those "buy it now" deals
where you avoid the auction. I bought it from the wire company, not an
individual and it was only $13, which I thought was reasonable, if not
cheap. Any comments? Should I contact the company and complain or is
this just something to be expected with magnet wire?
Think Positive

----- Original Message -----
From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
Sent: Friday, April 22, 2005 7:11 PM
Subject: Re: Aluminium Magnet Wire for Secondary

> Original poster: "Brian"
> Hi, in the motor shop the only problem is as you say, it has very
> spring, so it will loosen real easy, keep some vinyl elec tape
pieces handy
> in case you have to stop. if it kinks it will break.
> alum wire wants constant tension while your winding, i use a
clothespin with
> felt glued to the jaws, or folded over then put in the jaws. also
need a bit
> of braking action on the coil to keep it from getting out of control
if you
> have to stop. cul brian f.
> ----- Original Message -----
> From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> Sent: Friday, April 22, 2005 5:16 PM
> Subject: Aluminium Magnet Wire for Secondary
> > Original poster: Terry Fritz
<<mailto: teslalist@xxxxxxxxxxxxxxxxxxxxxxx>teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
> >
> > Hi All,
> >
> > I have about 4 pounds of #24 aluminum magnet wire.  I was thinking
> using
> > it to rewind my small coil secondary.  I know it is somewhat more
> resistive
> > and all that, but I was just wondering if anyone had actually
tried it
> > before and had noted any problems with it?
> >
> > I figure it will wind just like copper.  Since the enamel is the
> glue
> > and such should stick to it fine.  The terminations are tooth
washers and
> > bolts so no solder is needed there.   I might have to test it to
be sure I
> > don't pull it too hard and break it.
> >
> > Aluminum has no real "spring" to it so it may tend to loosen more
> > easily.  I think it is softer than copper so it might wind easier.
> >
> > Just thought I would check around to see if anyone knew of any
> > problems with it.
> >
> > Robert Stephens sent it to me years ago, I finally will be able to
use it
> > now ;-)
> >
> > Cheers,
> >
> > Terry
> >
> >
> >