Re: Calling all convergence experts, wizards, and gurus

From: Kent Murphy <kentpmurphy_at_gmail.com>
Date: Sun Mar 13 2011 - 18:22:14 EDT

Well at least you got purity set correctly. For the life of me, I cannot
get the purity adjusted on my new tube.

http://forums.arcade-museum.com/showthread.php?t=172614

Kent

On Sun, Mar 13, 2011 at 3:31 PM, Andre Huijts <a.huijts@upcmail.nl> wrote:

> That looks EXAXTLY like the problem I have with a friend's Amplifone set-up
> with a LOW-res tube....I actually blamed the Low-res tube for it....
>
> Just like you, the green is the color to be ABOVE the blue and red on the
> top of the screen, and BELOW on the bottom side....
>
> Drove me nuts and I never solved it....
>
> Could the convergence magnets be loosing their magnetism a bit ?
>
> Andre (Is this one also posted on the KLOV forum Scott ?
>
>
>
> Op 13 mrt 2011, om 16:45 heeft Scott McGovern het volgende geschreven:
>
> > I've filtered through many previous posts on here, but I am hoping that
> my questions can elicit some more tutorial like suggestions to fix my
> convergence issue. I am putting together a 25" "amplifone" vector monitor
> to go into my Star Wars cockpit de-conversion. Like others have done
> previously, I am using a 100deg 25" medium resolution tube, wells gardner
> 6100 yoke, and amplifone deflection/high voltage pcbs. Here is a zoomed out
> pic of what I've been able to accomplish (all pic links are 800px wide):
> >
> >
> https://lh5.googleusercontent.com/_xUpoDi3iW5A/TXzhVLoALpI/AAAAAAAAAXM/ZZaFJs4CH7s/s800/IMG_5659.JPG
> >
> > As you can see all three colors are pretty well converged
> left/right/up/down in the center (although you can see the green starting to
> diverge towards the bottom in this center close up pic):
> >
> >
> https://lh4.googleusercontent.com/_xUpoDi3iW5A/TXzhXESrx0I/AAAAAAAAAXU/8v-Bl80793k/s800/IMG_5661.JPG
> >
> > I have the red/blue pretty well converged everywhere. However, I cannot
> get the green to lay on top of the red/blue near the top and bottom edges.
> In addition to a small vertical offset, the green does not bow inward to
> the screen's center as much as the red/blue does:
> >
> >
> https://lh4.googleusercontent.com/_xUpoDi3iW5A/TXzhVEAv4JI/AAAAAAAAAXI/vDQHCusMe-g/s800/IMG_5662.JPG
> >
> > The sides are fairly well converged, though (certainly better than the
> top/bottom):
> >
> >
> https://lh4.googleusercontent.com/_xUpoDi3iW5A/TXzhVEpTPdI/AAAAAAAAAXE/RtI1qd-7ylk/s800/IMG_5666.JPG
> >
> > OK. So here are the questions. What can I do to get the green to lay on
> top of the red/blue on the top and bottom edges? I cannot seem to get there
> by adjusting the convergence rings. And, further yoke movement
> left/right/up/down from where I am seems to undo the work to get the
> red/blue to pretty much align well everywhere. I've also tried moving the
> rings forward/backward relative to the yoke and re-adjusting them, but I
> can't get that to do the trick either.
> >
> > At this point, am I just down to working with the strips and chevron
> magnets (I have a good supply of both)? If so, are there any tutorials or
> step-by-step instructions for *how* to use these to achieve convergence on
> the top and bottom? So far, my experiments where I am just moving them
> around never gets all three colors to align (most of the time it looks like
> I am undoing what I have). And, both the strips and chevron magnets seem to
> have more impact on the corners than the center of the edges, which is where
> my biggest convergence issue is.
> >
> > Any help or suggestings are greatly appreciated! I want to get this
> monitor converged and placed back into the cabinet so I can play Star Wars
> again.
> >
> > Thanks in advance
> >
> > Scott
> >
> >
> >
> >
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>
> André Huijts
> andre.huijts@upcmail.nl
>
>
>
>
>
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Received on Sun Mar 13 18:39:49 2011

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