Degause a B/W CRT?

[old_tv_nut]

Originally Posted by dtvmcdonald

Beam landing POSITION errors in a shadow mask tube, if small, don't cause purity problems. The problem with them is that magnetic fields result in landing ANGLE errors, which send the beam to the wrong place after the mask.
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Yes, but I just didn't want to get into it, but on to the relevant point that the geometric distortion, if any, is not noticeable.

Originally Posted by dtvmcdonald

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I too would expect that the usual minor magnetic fields in a metal cone
B&W tube would not result in problems with ordinary program material.
For high resolution specialty monitors, that might be very different. That has
already been mentioned.