RE: Major Havoc with 25" monitor

This isn't rocket science. Get a 25" tube that is pin out compatible and
uses the same voltages for the grids. Some that have been used are U5000
and old RCA tv 25" tubes. Install your yoke (Amplifone for a 90 degree
tube or WG for a 100 degree tube. You will probably want to order some
new convergence rings from hawkeye. They're only $4.25 each. And perhaps
some cheveron magnets too. Converge according to instructions in WG
K55xx manual.

This isn't any more difficult than replacing a tube on your 19" monitor
with another 19" tube.

JB

-----Original Message-----
From: Tom McClintock [mailto:tomm@mgcap.com]
Sent: Monday, September 15, 2003 10:00 PM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Major Havoc with 25" monitor

I've got all Jon's pictures somewhere at work. I'll try to
dig them up tomorrow and drop them on my server.

tm

On Mon, 15 Sep 2003 19:57:12 -0400
  Mark E Davidson <mark@basementarcade.com> wrote:
> That was Jon Raiford... Here is his posting form 2/2000
> but Im afraid the link is dead
>
> For those of you who have been following my project, I
> have finally finished the technical portion. My Major
> Havoc now lives in full color (converged pretty good
> too) in a 25" 720 cabinet complete with custom control
> panel. There is an awful log of bowing on the display,
> so it is probably worth my while to install one of
> Clay's display correctors (Clay: any chance you want to
> donate one to a good cause?)
>
> I do have one question. During the convergence, even
> though it all went smoothly, it is still a little off at
> the top and bottom of the screen. The red and blue are
> both dead on with each other, but the green gradually
> pulls away the further away from the center you get.
> The convergence magnets don't seem to fix it, and the
> yoke appears to be at its optimal location, yet I still
> seem to have this problem.
>
> Is this why magnetic shunts are sometimes used? Could
> it be the location of the magnetic convergence assembly
> itself? Or is this just the effect of a yoke not
> designed for a particular tube? As it is, it does look
> pretty good already. I guess I'd just like to make it
> perfect. I'll post a picture later tonight showing the
> effect that I'm seeing.
>
> Jon
>
> ftp://arcade.ne.mediaone.net/incoming/720-to-MH/720toMH_Working.jpg
>
>
>
> Hendrix, Jeff wrote:
>
> >I remember a while back someone here took a monitor out
> >of a 720 and using
> >parts from an amplifone monitor (and a WG yoke if I
> >remember right) and
> >built a 25" vector monitor.
> >I remember he had a web site that showed all the steps
> >and I can't seem to
> >find it.
> >If someone has that web address, could you post it.
> >
> >thanks
> >-jeff
>
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