Re: 19VLUP22

** Jon steps away for 10 min's while he swears...

Ok.. Well, darn. What about using an Amplifone chasis with a Wells Gardner yoke?
Yeah, I figure that probably won't work either. I guess if I'm going to make this
game truly special and unique, I suppose doing major monitor work is required. Didn't
someone have something written up on changing the pins on a monitor's neck socket?
Rodger maybe?

If I understand right, what I'll have to do is:

<done> 1) Strip the 720 monitor chasis and yoke
         2) Install Wells Gardner yoke and put back 720 convergence rings
         3) Remove nipple from 720 monitor neck
         4) Install nipple from Amplifone (or other "standard" tube)
         5) Rewire the neck board to accept a different pinout (how can I do this w/ WG ?)
         6) Install neck board
         7) Build a big-ass heatsink to hold chasis transistors and wire up some sockets
         8) Mount the deflection, HV, and bastard heatsink
         9) Finally the easy part.. Convergence and Purity adjustment

Is that all? Gee.. Only 9 simple steps :)

NOTE: Jeff Hendrix: make a note of this.. You'll want to do this when you get around
to looking at your Star Wars cockpit. The inability to converge with the Amplifone yoke
is enough to warrant this nightmare (it better work too).

Jon

BTW, I will be happy to trade you 6 AR2's or 3 AR3's for a custom heatsink hack
(including sockets & mica's) :) I'll supply the wire and inline connectors.

At 12:23 PM 12/29/1999 -0800, you wrote:
>--- Jon Raiford <raiford@mindspring.com> wrote:
> > An oddball tube? Are you sure about that? I
> > thought it was the same as G07's and
> > most color TV's.
>
>The Wells Gardner tube is used in G08's and was used
>in a couple of TV's in the early 80's I believe, but
>it is fairly rare. It has a 100 degree deflection
>angle (most tubes are 90 degree). This is what
>causes the bulging problems when using a Wells Gardner
>in a Star Wars. The plastic nipple on the neck of the
>tube is very different than that used on an amplifone.
>
>The amplifone nipple OTOH is the same as many TV's
>and raster monitors.
>
> > If anything, I thought the
> > Amplifone had the oddball tube even though
> > the pinout was the same as most. If it really does
> > use an odd tube, then I'll have even
> > more "fun" throwing WG boards on my 720->MH
> > conversion. I really didn't want to
> > get into changing the pins on the neck board.
>
>You will most likely have to find the "nipple" off
>the end of a 19VLUP22 tube and transfer it to the tube
>you are going to use for the conversion. Otherwise,
>the socket on the WG neck PCB won't mate with the
>tube.
>
> > Btw,
> > any idea what I can use for holding
> > the chasis transistors for my little hack? I was
> > planning to destroy a bunch of AR2's
> > to use the heat sinks (since they already have the
> > socket for the transistor and they
> > are a dime a dozen), however I feel really bad about
> > destroying anything made by
> > Atari.. Does anyone have a better idea? I'd love
> > to hear it.
>
>I've seen TO-3 heatsinks for around $2.00 apiece from
>Electrotex. These could be mounted on a piece of
>sheetmetal that had been drilled for the chasis
>transistors. Perhaps you could use the baseplate
>from an old raster monitor or just buy a piece of
>heavy
>guage sheet metal (maybe 12" or 18" square). Drill
>it for the transistors, and then mount the TO-3
>heatsinks for added protection. Heck, I would be
>happy to build you something in exchange for a few
>AR2's! :-)
>
>Or, if you are planning to use Wells Gardner boards,
>why not use the Wells Gardner chasis as well? That
>is unless you are still going with a 25" tube. I
>believe it is fairly standard procedure when building
>a
>"hybrid" monitor out of a 19" amplifone (or other)
>tube/amplifone yoke and Wells Gardner boards to go
>ahead and use the Wells gardner chasis to hold the
>transistors and boards.. :-)
>
>Noel Johnson
>
>
>
>
>
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Received on Wed Dec 29 15:00:26 1999