Re: EMF Shielding

["John Moulder" <jmoulder@post.its.mcw.edu>]

> What is the best material for shielding EMF radiation?

Depends what you want to shield (static vs ELF vs RF/MW).

Computer jitter is usually an ELF problem, because static fields cause 
distortions rather than cause jitters

> from the information I've been able to gather, it's some sort of 
> mysterious alloy.

Probably a reference to "mu" or "Muntz" metal which is a nickel-iron-copper 
alloy.  This is the best ELF and static shield, but is very expensive.

> The problem we're having is a jittery computer monitor due to its 
> close proximity to our electric service entering the building adjacent 
> to where this monitor is being used.  Moving the monitor away from 
> the source diminishes the screen jitters, but not completely. 
>  
> A company called Field Management Services sells a "Jitterbug"... it costs 
around $700.00. 
>  
> Just wondering if a piece of metal of some sort would solve our 
> problem for cheaper. 

Try a sheet or hoop of iron before you spend the $700.

You might also try switching monitors, some seem to be more resistant to 
external ELF fields than others.  In particular some of the "low emission" 
monitors may have better shielding.  A monitor with a metal case may also do 
better (if you can still find one).


------------------------------------
John Moulder (jmoulder@its.mcw.edu)
Maintainer:  Powerlines & Cancer FAQs, 
             Static EM Fields and Cancer FAQs
             Cell Phone Antennas & Health FAQ
USENET: sci.med.physics, sci.answers, news.answers.
http://www.mcw.edu/gcrc/cop.html/