On 3 Oct 2011 at 17:40, Dave Caroline wrote:
The other really strong field from a monitor is the
degauss coil
around the tube at switch on and was probably the guilty source
I own a fairly strong degausser that I use on diskettes. For it to
be effective, the disk must almost be in contact with the surface of
the degausser. With only an inch of separation, almost nothing
happens. The material used in floppy disk emulsions has a pretty
"square" magnetization curve.
--Chuck