Fun with degaussers

From: Allison J Parent <allisonp_at_world.std.com>
Date: Sun May 2 11:19:28 1999

<disks did the trick. Other empirical evidence was accumulated when the
<demagnetizer shut itself off while I was using it near the disk, (thermal
<shutdown to prevent meltdown I guess). That disk was unusable until the
<demagnetizer reset and I could use it more carefully.

When the thermal cutout opened there was a momentary spike. At that point
rather than radom magnitisation you nailed the disk with a fixed field
and really magnetized it. The powered demaggers whould be moved in a
circular patter from surface contact to about arms length befor powering
off to avoid that.

FYI when wiping disks I use a ceramic magnet and move it uniformly over the
surface in a circular pattern ten move it away while continuing to move it.
works just as well as a line powered demagnetizer.

Allison
Received on Sun May 02 1999 - 11:19:28 BST