RE: Vector monitor Yokes.

Okay... here is the newbie question from the Aussie desperate for another
color vector....

I have a tube suitable (med res) but no yoke (or anything else for that
matter, but I can ship the rest) and I have several Asteroids monitors...

Is a vector yoke a vector yoke? Will the Asteroids yoke work on the med res
tube.

My guess is not.

Thanks
Paul

> ----------
> From: Rodger Boots
> Reply To: vectorlist@synthcom.com
> Sent: Saturday, November 11, 2000 12:50 am
> To: vectorlist@synthcom.com
> Subject: Re: VECTOR: Vector monitor Yokes.
>
> First off, it's yoke, not yolk.
>
> VGA yokes are fine in the horizontal direction, but have way too much
> inductance in the vertical axis. A proper vector yoke will have
> almost identical inductance in both directions and it shouldn't be more
> than about 1 mH. 1/2 mH would be great, but there are
> tradeoffs. As the inductance goes down it takes less voltage to move the
> beam a given distance in a given length of time. But less
> inductance means less winding which means more current will be needed for
> a given amount of deflection.
>
> It's all a tradeoff.
>
> A TV yoke would work IF you don't mind trying to control high voltages.
> Transistors have problems with that (especially bipolar
> transistors---power MOSFETs are better at it). If you guys wouldn't mind
> using brute force 400 volt supplies and 6AS7 vacuum tubes we
> could do wonders with TV yokes. And the monitor could double as a
> supplemental heater for those cold winter nights.
>
> Wintron claims they will custom build yokes, but as far as I know none of
> us have had the guts to ask what that would cost.
>
> Personally, what I worry about is the "fiddly bits". Getting a CRT is no
> problem and the yoke COULD be custom built, but I don't know
> where to get stuff like convergence assemblies. If everyone could get
> together and group buy over 100 assemblies we could probably have
> someone like Samsung sell us entire CRT/yoke/convergence/neck socket
> assemblies all set up and ready to go. Or use Philips CRT and skip
> the convergence assemblies entirely (their tubes come from the factory
> matched to the yoke and need no convergence assembly at all).
>
> All of this is high on my list of things to do if I hit the lottery.
>
>
>
> peter jones wrote:
>
> > there was some talk recently about replacement tubes, the subject turned
> to yolks because a tv version is not fast/powerfull enough.
> >
> > I was wondering, would a yolk from a VGA monitor be fast enough????
> >
> > I have some old 20" apple hi-res monitors here, i was thinking how good
> it would be to convert them into vector-monitors!!!!
> >
> > L8r.
> >
> >
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> --
> Windows:
>
> 32 bit graphical interface for a
> 16 bit patch for an
> 8 bit operating system written for a
> 4 bit processor by a
> 2 bit company that can't stand
> 1 bit of competition.
>
>
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>
>

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Received on Sun Nov 12 17:08:30 2000