This is something I posted on the newsgroup back in July.  It's basically
how to get a new 25" picture tube for your Star Wars Cockpit and get the
color convergence done. It's a common thing, and a shame for that matter,
for a Star Wars cockpit to be using a 19" wells gardner monitor.

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Subject: Star Wars Monitor HELP!
Date: Fri, 27 Jul 2001
From: Matt Rossiter <rossiter@ni.net>
Newsgroups: rec.games.video.arcade.collecting


These are the steps that I'd take.

1) Calm Down.

2) Get someone with a tube tester to verify that your tube is really bad.

3) If it's bad, I'd buy a new one rather than having it rebuilt since it
has pretty bad screen burn. I bought the A63ABZ26X model from Clarke
Electronics for about $154 bucks.  http://www.picturetubes.net.  Keep in
mind that the 25" tubes are indeed 100 degree tubes whereas the 19" ones
were 90 degree tubes. You'll see some keystoning - but trust me - I put
one in my Star Wars cockpit a year ago and it looks awesome.  You can also
try http://www.hawkeyepicturetube.com

4) Buy yourself some rubber wedges and magnetic shunts from your closest
mazzco dealer - http://www.mazzco.com/html/location.htm.  Give them these
Wells Gardner part numbers - (wedges) 008X0374-001 and (magnetic shunts or
tabs) 009A2808-001. They are $0.40 cents a piece.  You'll want these when
you have to do the color convergence on your new tube. I also recommend
getting a hot glue gun.

5) Get ready to spend some time doing your purity and convergence
adjustment!  Download the amplifone manual and follow their procedures
-or-  I have my own procedures for doing convergence:

     a) put game into test mode with white grid screen on.

     b) slide yoke on and adjust yoke back and forth until all the colors
     (usually separated at this point) are a clean red, green and blue.
     Also making sure the grid is straight and not warped. Put a rubber
     wedge temporarily up top to keep its position

     c) slide magnetic assembly on with all the tabs pointing upward and
     have the purity tabs (the first two) over the first gap in the
     electron gun assembly - maybe adjust the position slightly back and
     forth to get your desired result and then screw it down.

     d) adjust your purity first by flipping the test screen to the solid
     red square screen and pull the first two tabs (purity tabs) apart and
     adjust them until your solid red square has absolutely no
     discolorization spots.

     e) go back to grid screens but flip until you get to the purple screen
     and adjust the red and blue tabs until you have the red and blue
     converged as much as possible.

     f) flip to the white grid screen again and adjust the green and red
     (third set of tabs) so that you finally get a pure white grid.

     g) use your paper magnetic shunts to align the edges properly. It's
     almost impossible to align the edges without using the shunts.


Please take caution be responsible in whatever you do.  I'm only sharing
how I did mine. I'd recommend you refer to the factory manual first. If
you aren't sure about any of this - then get someone with experience to do
it and refer to the factory manual.

Hope that helps.  good luck!


Matt
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