On Sun, 22 Apr 2001, Clint Wolff (VAX collector) wrote:

> 
> Speaking of Faraday cages, how would one go about doing this?
> 
> I'm preparing an area of my basement (directly below the breaker
> box :) to be used as a computer room, and I'd like to shield it
> as much as possible. Since the TV is going to be ~20 feet from
> the VAXen, I'm rather concerned...

I'm not sure you will get all that much interference out of one, unless
you run it with the chassis open.  There is a G_D awful lot of shielding
already in the chassis, which is built of thick, heavy steel...

> 
> The cages I've seen are made from an expensive copper screen,
> like window screen, but they are for doing FCC interference
> measurements, not shielding. I can get 1/2 inch square fencing
> from the look home improvement center, but it is galvanized and
> quite a bit coarser...

I doubt that would do too much-- but IANAEE.  YMMV.  If I were to do
something like that, I would check the local scrapyards for copper screen
(just on the off chance) and most likely use {galvanized,}steel
window-screen.  Should be pretty cheap, all things considered.  

> 
> Comments?

Never hurts to try.  Let us know of it works out...

> 
> Clint

Bob