[TowerTalk] Fwd: Fwd: Shielded shack

[Grant Saviers]

snip

The one experience I had with a homebrew metal window screen cage 
(copper or bronze, I forget which) was that it didn't work very well 
because the wire crossings really aren't solid electrical contacts. The 
fix was to have a tech solder them in a 6" grid of X-Y lines - ugly!

Based on the other comments, I would think expanded steel mesh might be 
an easy way to get good results - see McNichols.com  but not cheap.

Grant KZ1W
>> Metal window screen works well into the GHz range
>
> For lower frequencies, you need thicker material for good shielding: 
> the skin depth is bigger.
>
> To be a good shield, it needs to be at least 5 skin depths thick (that 
> makes the field on the "inside" exp(-5) that of the outside (about 
> 40dB down)
>
>
>
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