DIYbanter - View Single Post

Caesar

wrote:
You appear to have forgotten your own advice. transformers dont produce
enough field, nor do shavers or motors, I've tried both on floppy
discs, with no effect. A shadowmask is a distance away from the front
of the screen, so will see even less field strength. Once you see a
bulk eraser you'll see why motors etc wont do it.

Tape head demagger also had no effect.

I strongly disagree with the above.

While a bulk tape demagnetizer is probably the best thing to use, I have
demagnetized many CRTs with an AC pencil sharpener and a pencil. These
are generally readily available. Cheap pencil sharpeners seem to work
best. I generally use a Boston one .

While several feet away, insert the pencil to start the sharpener.
Bring it close the the CRT and move it around, then back away from it
before removing the pencil. You will now have a demagnetized CRT and a
short pencil! Don't use a pen!!!!

If you want to see the effect, keep the TV on while doing it...it won't
hurt. You will see the magnetic field in action.

cv