[Reece]

I used to degauss CRT's with a small power transformer the core of which was E and I laminations. I took out all the I laminations which left the three legs of the E open, the coil wound on the center leg. The ends of the legs then "shoot" plenty of field. Plug this in across the room from the TV and slowly approach the TV screen moving the transfomer all around slowly. You can get pretty close to the screen and see the colors moving around. Then back away slowly across the room before unplugging. You can also use a soldering gun for this: the built-in transformer has a good external field. Remember to hold in the switch starting across the room and don't release the switch until you've backed away again.