Many years ago, I used to build myself a magnetic coil, in order to manually degauss my CRT screens. First I would approach the coil nearest to the center of th

Many years ago, I used to build myself a magnetic coil, in order to manually degauss my CRT screens. First I would approach the coil nearest to the center of the screen, then moving it slowly away, while turning the coil on itself. I worked very well