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JC,

Having tackled this issue myself for other apps, I can point you to an
excellent resource, "The Art Of Electronics" by Horowitz & Hill. In
there, they outline some techniques witch you may consider paranoid, but
I have found to work. For instance, building an enclosure within an
enclosure. The outer enclosure is little more than a way to terminate
your outside wire connections (including power), allowing you to bring
them into a controlled environment where you can then apply such gross
tricks as caps & ferrite filters on your power lines and data lines
(don't forget fuses!). After you have performed whatever magic you can
on the in/outbound leads, you then bring the signal & power into the
inner enclosure.

Also remember that for homemade enclosures of bent & riveted aluminum,
small gaps where one flap is riveted to another can have gaps in then
which WILL leak RF. To fix this, your local electronics parts supplier
(or Digikey) will sell conductive tape. Welding also works. When
attaching the top of the enclosure, you could employ either one of those
fine mesh springy wire gaskets, or ... more tape.

Good luck,
Evan Carew

P.S.
IF you want me to forward some of the specific steps outlined in TAOE,
let me know.
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