2 Sep
2008
2 Sep
'08
8:53 p.m.
If there really is foil inside,
I don't know how much EMI suppression it would do,
since there is no connection of ground or other way
to bleed of any incident energy. Rather, I'd guess
they probably make pretty good reflectors of EMI,
instead. But what do I know, I'm hardly a hardware
guy.
Yes, it may be more magnetic. USR ran into a problem with the power
supplies for their rack modems when I worked there - one of the
transformers on the SMPS power supply board(s) leaked a little too
many flux lines onto the closest signal board (NMC?), causing
problems. There was a quick fix with a shield. I suppose it worked on
eddy currents or something.
--
Will