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The sharpness isn't that great because you replaced a magnetically focused tube with one that is electrically focused, you can probably improve it by applying some B+ voltage to the focus pin, it's usually the one all by itself 180 degrees from the other pins. Sometimes they focus OK with no voltage on the pin.
The centering is off because you took off the centering control, or at least the magnets. It may still work, try loosening the wing nut and slide the lever around and see if it makes any difference, regardless of the CRT type it should still work.
Removing the magnets is something that shouldn't be done, once you disassemble that focus assembly it will never work properly again even if you put the correct CRT back in, there is a polarity to the magnets and it's unlikely you would get them all back in correctly, however the centering portion may still work.
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03-14-2013, 10:54 AM
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