Degause a B/W CRT?

[Robert Grant]

(Apology for posting a little OT):

About 40 years ago, I put the magnet of a magnetic-mount CB antenna against the face of the CRT of a monochrome TV set.

The effects were psychedelic. At several inches, a small portion of the picture was distorted and the image in the center was turned clockwise.

Placing the magnet closer to the tube turned it drastically, and created a "Black Hole" in the image.

After withdrawing the magnet, the picture assumed normal shape as if nothing unusual ever happened.