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Re: Aluminium Magnet Wire for Secondary

Original poster: "claudio masetto" <claudmas@xxxxxxxxxxxxxxx>

Small bumps of enamel and minute pin holes can be quite common on lower grade of winding wire but won't cause any problems. On the other hand, larger bare patches will cause problems and this is a sign of poor quality control and a problem with the manufacturing process. I remember at work we had a batch of wire from Korea which was cheap but was riddled with excess enamel and bare patches.

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, April 24, 2005 12:24 AM
Subject: Re: Aluminium Magnet Wire for Secondary

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" > <<mailto:ka1bbg@xxxxxxxxxxxxx>ka1bbg@xxxxxxxxxxxxx>
> Hi, in the motor shop the only problem is as you say, it has very little
> 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
> >
> > Hi All,
> >
> > I have about 4 pounds of #24 aluminum magnet wire. I was thinking of
> 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 same,
> 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 special
> > problems with it.
> >
> > Robert Stephens sent it to me years ago, I finally will be able to use > > it
> > now ;-)
> >
> > Cheers,
> >
> > Terry
> >
> >
> >