From: mike 


Those EM requirements are still there, the "radiated signals"
were radio waves.  The emission specs were imposed by the FCC because the
PCs were emitting so much radio-frequency noise that they were starting to
interfere with TV and radio broadcasting signals in the homes. (note that
the emission limits for office-use computers were not as strict as those
for the home)

Back in the 386 days, there was the onslaught of super cheap no-name white
box computers.  They were the worst so far as radio interference went..

If you look on the back of a computer nowadays, you'll still see FCC
compliance markings.


  /m



On Fri, 01 Jun 2007 21:02:42 -0400, "John Beamish"
 wrote:

>I remember back in the 386 days that there was a serious issue with EM
>radiation and, to keep within guidelines/standards the cases *had* to be
>made of metal and the openings for heat radiation, etc., had to be
>carefully positioned so that they didn't let out too much radiation.  (Not
>x-ray, gamma ray type radiation, obviously, but radiated signals.)
>
>So ... what's changed?  Standards are more generous or chip design is less
>"leaky"?  Or ... ?
>
>
>On Fri, 01 Jun 2007 15:05:53 -0400, Rich Gauszka
> wrote:
>
>> #9 the Painmaster 5000 must be reserved for Vista users. I do like #1
>> CompuBeaver a bit
>>
>>
http://www.extremetech.com/slideshow/0,1206,l=207769&s=26633&a=207762,00.asp
>>
>>

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