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This tube has a little ball inside for the anode connector, and the face is slightly rounded. Without pulling the CRT forward, I can't see clearly whether there's a bump where the neck meets the bell. When you push the deflection yoke forward, the bell (or bump) actually touches the coil inside before it meets the rubber pads. There's a gap of maybe 1/4 inch between the bell and the pads.
The gun looks like the diagram. The ion trap doesn't work if placed right over the gap as in the diagram, however. The only spot where it's bright is pushed back against the tube base. Don't ask me what's going on here, but the CRT is as bright as any B/W tube I've seen.
The bulbed face drives me nuts when I'm trying to take a screen shot. The image looks sharp to my eye, but not as sharp in the photo. Maybe the camera's auto-focus can't decide what to focus on . . . .
Phil
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