[sdiy] Noisy transformers and faraday cages

[Roy J. Tellason]

On Friday 11 May 2007 10:30, John Mahoney wrote:
> At 10:43 PM 5/10/2007, Jeff Farr wrote:
> >...  And ditto about the Mu-Metal too, but it's
> >somewhat hard to find and expensive.
>
> Not so hard to find, just search for it at http://www.mcmaster.com/.
> But, wow, it sure is expensive! A 15" by 12" piece costs from $35 to
> $102, depending on thickness. I don't even know what it is, I've only
> heard that it's for shielding. Time to check the Wikipedia...

It's also my understanding of it that the magnetic shielding properties are 
adversely affected by "working" it...

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin