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Discussion Starter · #1 ·
OK,


I finally pulled the trigger and bought a 9PG Xtra from Hammerhead....450 hours on original tubes! I took the lenses off tonight and even the green tube is as white as a sheet...I'm thrilled with my purchase!!!


I have been going through the mechanical setup guide pdf on this site and I was looking at my image on the raster and with all the settings zeroized I don't get anything close to a rectangle. What I do get is a rectangle where all 4 corners extend up and away....to correct this I noticed that I needed complete pincushion to get the image close to being a rectangle on the tube face. Anyone know what's going on here? Should my raster be somewhat rectangular once all settings have been zeroized? It seems that the writers of this guide think all that could be necessary is some keystone adjustments....any thoughts??


Thanks,


Ben
 

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Sounds normal to me, don't worry about it.
 

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On an NEC, if you have very SEVERE pincushioning on the raw test pattern, you need to verify that your CONTROL plugs MATCH the orientation of your SWEEP plugs.

Ie. If your horizontal and vertical sweep plugs on the main deflection board are oriented to reflect a floor mouted front projection setup, your convergence control plugs underneath the main deflection board MUST match that orientation. You can't have the deflection plugs in the floor mounted front projection configuration and the control plugs in the ceiling mounted front projection configuration.

With this all setup properly, your raw test patterns will be roughly trapezoid, and not pretty. I'll be in Ottawa today, email me your address if you'd like me to stop in if I have time?
 

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Discussion Starter · #4 ·
Paul,


I just emailed you my co-ordinates...hopefully our paths can cross tonight. I will double check the orientation of the control and sweep plugs when I get home.


Thanks,


Ben
 
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