6 May
2024
6 May
'24
6:59 p.m.
On 5/6/24 11:28, Wayne S via cctalk wrote:
You do need a very strong magnet. I’ve put 3.5
floppies on top of a mag tape demagnitizer ( not technically called that, but you know
what i mean) and it had no effect at all. I could still read them fine in my pc. I
surmised that the magnetic field generated was not strong enough to get through the
plastic disk shield. Gave up after that.
I made my own PM demagnetizer (I do own a bulk videotape eraser also,
but this one is so convenient and works very well). The trick was to
use two magnets with like poles facing. I got the magnets from a
magnetron--it took a fair amount of clamping to get the things set in
place. Unlike poles facing doesn't work, BTW.
https://i.imgur.com/MUKTExa.jpg
--Chuck
