Re: 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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