Re: XY proto Yoke dilema

OK, my two cents worth.

The yoke should be matched to the tube, otherwise you end up with all
kinds of pincushion problems.

It is critical, for a vector yoke, that the inductance be close to the
same in both windings. Further, it can't be more than about 2 mH unless
you want to handle some high voltages. I doubt your amplifier circuit
will drive over 1 mH without blowing output transistors. Check out the
secondary breakdown specs on your transistors.

A TV flyback may have usable inductance in the horizontal coils, but is
usually WAY too high in the vertical coils.

The yoke I was looking at also fits a 29.1 mm neck. I was never able to
find a spec on the CRT though (A48AAB37X RCA CRT or equiv.).
        
Wintron does claim not only to be able to make custom yokes wound for
custom impedances, but to also be able to match them to a particular
tube.

I'm not trying to discourage you, just be sure you know what you're
getting yourself in to.

Jilayne Stanclif wrote:
>
> Okay,
>
> I talked to Philippe and he is going to do this hell or high water. So
> give me what you guys think would be the best spec's on the yoke. What about
> picussion? SHould we just deal with that like space duel? or should we do it
> in the yoke?
>
> Fred
> ----- Original Message -----
> From: "Jilayne Stanclif" <jstancliff@mchsi.com>
> To: <vectorlist@synthcom.com>
> Sent: Wednesday, June 12, 2002 9:32 PM
> Subject: Re: VECTOR: XY proto Yoke dilema
>
> > I actually thought about this and talked to few people about it this
> > earlier, but came to the conclusion it would be to much of a botch job and
> > would be hard to converge and bust necks off in shipping. Plus the yoke
> > design that I have with the hacked TV yoke is not going to be low enough
> > inductance for the faster games.
> >
> >
> > Fred
> >
> > ----- Original Message -----
> > From: "Curtis H. Wilbar Jr." <vector@hawkmountain.net>
> > To: <vectorlist@synthcom.com>
> > Sent: Wednesday, June 12, 2002 8:15 PM
> > Subject: Re: VECTOR: XY proto Yoke dilema
> >
> >
> > >
> > > This may sound "silly", but if the yoke is make for a tube with
> > > a larger diameter neck, but still the same angle tube, couldn't one
> > > fabricate a "shim" (flexible (but not crushable) tube segment with a
> > > slot cut length wise to allow it to compress and grip the tube neck
> > > or two shims that would do much the same thing) ????
> > >
> > > Seems that would be cheaper than having custom yokes made....
> > >
> > > -- Curt
> > >
> > > >From: "Jilayne Stanclif" <jstancliff@mchsi.com>
> > > >To: <vectorlist@synthcom.com>
> > > >Subject: VECTOR: XY proto Yoke dilema
> > > >Date: Wed, 12 Jun 2002 18:24:31 -0500
> > > >MIME-Version: 1.0
> > > >Content-Transfer-Encoding: 7bit
> > > >X-Priority: 3
> > > >X-MSMail-Priority: Normal
> > > >X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000
> > > >
> > > >Okay men,
> > > >
> > > > I got the first real hurldle to cross here. Maybe someone has a
> good
> > > >answer as this has come up before I'm sure.
> > > >
> > > > Looks like the only new CRT tube's available now are 22mm neck. The
> > tube
> > > >I'm looking at uses the same type mask as the 19v's but the new tubes
> use
> > > >better phosoher and look better. This is all good, but the bad news.
> > > >
> > > > The yoke I planned to use was an easy to modify TV yoke that has
> > pretty
> > > >low impedance or I looked at high definition yokes that have low
> > impedance.
> > > >This is 28 mm stuff though.
> > > >
> > > > The dilema is that any standard low impedance yoke is going to be
> for
> > > >the larger neck because of the higher heat generated in the neck at
> highe
> > r
> > > >frequencys. I can't think of any application that would use a low
> > impedance
> > > >yoke with a 22mm tube???
> > > >
> > > > Anyone have an idea? Anyone have a place that will custom make
> yokes?
> > > >
> > > >Thanks,
> > > >
> > > >Fred
> > > >
> > > >
> > >
> >
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Received on Wed Jun 12 23:39:38 2002