A Little Flat Tube Fun

[crtfool]

The screens in the CRT Watchman sets are not flat, they are sloped, and the beam is scanned with a standard magnetic deflection yoke - very complicated geometry though.

The real marvel was the original FD-210 CRT Watchman that did have a true flat screen - it used electrostatic deflection, and the geometry was much better than in any of the later models with the sloped screens.