Here's an odd beauty
I appears to be a demonstration of electron diffraction behaviour. If
you look inside the tube you can see a target in line with the electron
gun. From physics lessons at school I remember a much simpler CRT
assembly. This appears to have deflection plates, PDA and a flat screen.
So it appears to be a much more sophisticated piece of kit than a simple
school demonstration for a bunch of bored teenagers.
I post it here to see if anyone can offer any commentary or
enlightenment on why the precision? Or is the tube something completely
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