Magnetic field viewing film - bistable, high resolution
Alan B. Pearce email (remove spam text)
>Wow, I didn't even know this stuff existed!
>Yes, you still can.
Great. Yes it is great fun to use. I did have reason to use it in serious
manner on a couple of occasions, and recommend its use on another couple.
Great for looking at sectoring on disks or (as illustrated on above link)
channels on tape.
See also: www.piclist.com/techref/index.htm?key=magnetic+field+viewing
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