On Fri, May 13, 2005 at 11:34:06PM +1000, Visser, Martin wrote:
> Basically a highly-conductive (read metal) box with no holes (or holes
> smaller than the wavelength of the EMF you want to shield from).
For what it's worth, that's a quarter of the wavelength (for non-round
holes, you measure the longest way).
For some equipment, they spray black, conductive carbon inside the box,
it absorbs more than it reflects because it is NOT highly conductive.
I presume you can buy the paint somewhere. With a shielded box, any
unfiltered wire that goes through from the outside to the inside will
puncture the shield and carry the EMF through.
- Tel ( http://bespoke.homelinux.net/ )
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