improvised faraday cage

[Highlander]

^^^^^^ you are right of course, a Faraday cage doesn't have to be solid at all, all that is needed is for the holes to be smaller than the wave lengths that threaten your equipment.

I think that the only reason people make them solid, or at least why I make mine solid, is that I dont know how large the wave lengths will be,...and it is usually easier to find solid metal containers