What the hell are people giving out the wrong way to degause a crt.

Here's how u do it: with tv on, unplug it from ac mains (power from
the wall), wait 5 sec, plug it back in & turn it on. the built in
degausing coil will degaus tube. every color tv or monitor has a
built in degausing coil.

or u can use an after market degausing coil to degaus (one that is
properly made for the job), otherwise damage can be done to the shadow
mask (inside tube just behind front surface glass), little lone flying
debree from a drill....

On 14 Apr 2004 14:06:10 GMT, ( Doug Goncz )
wrote:

Sure you can. You must spin the magnet with a motor to generate an alternating
magnetic field, then bring this field towards and away from the tube very
slowly to "erase" the permanent magnetization that caused the green spot.

An Alnico horseshoe magnet with mounting hole at the bride, a bolt, and an
electric drill might do, but this reply is intended to generate some
controversy so I will include the fact that rotating a permanent magnet on any
conceivable axis with any conceivable equipment generates an alternating field
of much lower quality than that produced by house current through the usual
degaussing coil.

Don't mean to stir up the water, but you can tinker with this to learn
something, then degauss properly.

You see, the alternating field must completely and symmetrically reverse to
average out to null. A rotating permanent magnet can have a bias on some axis.


Yours,

Doug Goncz ( ftp://users.aol.com/DGoncz/ )

My physics project at NVCC:
http://groups.google.com/groups?q=dgoncz&scoring=d plus
"bicycle", "fluorescent", "inverter", "flywheel", "ultracapacitor", etc.
in the search box