10 Nov
2008
10 Nov
'08
2:23 p.m.
People on this list have talked about some film that
changes
polarization or color or something in the presence of magnetic fields.
Core is orders of magnitude larger than the bit domains of floppy disks,
so using such a film to read out the core state non-destructively seems
like a good idea.
Yes, but how much 'stray' flux is there outside each core? Thinking a lot
larger, one of the features of torroidal (mains) transformers is the
relatively low external flux, so less interference nad the like. I would
have thought the static stray flux from a core in a memory plane would be
very difficult to detect.
-tony