On Mon, 05 Jan 2009 17:01:19 -0500, Tom Francis - SWSports
wrote:

The only way to completely restrict the reception of radio signals is
to build a grounded solid metal box of some sort or use a grounded
fine wire mesh in which the gaps are less than 1/100th of the base
line wavelength.

Tin-foil hats don't work?
Oh wait, that's "different" waves.
I thought Maxwell Smart had this stuff figured out with the cone of
silence.

--Vic