Re: WG/Amplifone yoke

I don't know how well you can do winding your own yoke coils. There can be a
lot of engineering put into the design of one.

  I used to work for a company that produced MRI probes and imaging coils for
research instution. The president was an old physics major that used to work on
TV's in college :-)
  All the coil really does is produce a magnetic field that deflects electron
beam(s) based on the driving current waveform. The rest of your deflection
circuitry will survive as long as you can duplicate the correct
resistance/inductance of the coil(s). The position, location, and shape of the
magnetic field produced needs to be correct for your purposes. Some plastic
form would be nice for winding your coil on, so it will have the correct
physical shape when you're done. Varying the geometry of your coil will change
it's inductance and the field that it creates.

  I don't know how sweet/pure/stable the field needs to be in the small area
within the neck of a tube, but I'm sure it's intensity is the most important
quality. Beware- the magnetic field can have other effects on nearby objects.
There was this book I read one time about this battleship in Virginia.....

    Kerry

"Curtis H. Wilbar Jr." wrote:

> If you have the same wire guage, you can "cheat" using an accurate
> ohm meter. If you know the ohms/length of the guague of wire, you
> can measure the resistance of the windings on a good yoke.
>
> This is only going to get you so close... but it might be close enough.
>
> I know someone who used to rewind ignition components for motorcycles
> that way.... although there is probably more room for variance doing
> that than yoke work.
>
> But it might be a start. I think the worst situation you would have is
> you wouldn't be able to get the picture right... but if your resistances
> on your home wound yoke matched up, the impedance would be close as well,
> and I don't think you would do any harm to the deflection amps.... how
> good a picture you'll get... well, that would be the experiment....
>
> -- Curt
>
> >Subject: VECTOR: WG/Amplifone yoke
> >Date: Sun, 6 Apr 2003 03:39:46 -0500
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> >Thread-Topic: WG/Amplifone yoke
> >Thread-Index: AcL7s3x6YqZ9WWiTT+CchomREWJ3WgAY/wgg
> >From: "Joe" <joe@joesarcade.com>
> >To: <vectorlist@synthcom.com>
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> >
> >Has anyone taken apart a WG 6100 or Amplifone yoke to see how many turns
> >of wire there are?
> >
> >Why I ask is I have a tube here with a 28mm neck that will otherwise
> >work for vector, but the neck is too big to fit the yoke over. So, if I
> >knew how many turns were on each winding, I could wind my own. But, I
> >have no dead ones to donate to the cause.
> >
> >Anyone have any dead ones to donate?
> >
> >Thanks,
> >JB
> >
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Received on Sun Apr 6 18:39:46 2003