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<DIV><FONT face=Arial size=2><SPAN class=125035114-21012008>In the lab where I
work, it's 50 Hz (UK).</SPAN></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><FONT><SPAN class=125035114-21012008>I had
contacted a collaborator who is now working in a company doing EMF testing,
for his advice on that sort of paint shielding etc stuff for my lab and
basically what he said was that the problem was more likely to
be</SPAN></FONT> an eathing or earthing loop issue<SPAN
class=125035114-21012008> ("</SPAN>50 Hz noise is<SPAN class=125035114-21012008>
</SPAN>very often from injected or stray currents rather than radiated
fields<SPAN class=125035114-21012008>"</SPAN><SPAN
class=125035114-21012008>)</SPAN>.<SPAN class=125035114-21012008> And in
his opinion and experience, i</SPAN>t's very hard to shield against 50 Hz
fields, and metal wallpaper etc won't work too well.</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><SPAN class=125035114-21012008><FONT face=Arial size=2>I personally didn't
pursue the idea any further.</FONT></SPAN></DIV>
<DIV><SPAN class=125035114-21012008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=125035114-21012008><FONT face=Arial size=2>Sorry
guys,</FONT></SPAN></DIV>
<DIV><SPAN class=125035114-21012008><FONT face=Arial
size=2>Nathalie</FONT></SPAN></DIV>
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