[sdiy] case shielding properties

[harrybissell]

At low frequencies.... STEEL rules.  Most effective against magnetic
fields...

At high frequencies... the box with the smallest "cracks" is the winner.
Probably
the die-cast aluminum will finish first because of the molded in lip in the
cover...
the other boxes will finish in the order of how well their covers fit.

For audio frequencies, the steel box is best, and hardest to machine.

darn....

H^) harry

mark s wrote:

> which offers better shielding properties, those thick die-cast aluminum
> alloy (380) boxes, a thinner finished-aluminum .040" box such as the LMK
> Crown Royal series, or a typical steel 19" rackmount box ?
>
> thanks
> mark