Jim Dunmyer wrote in a message to Gary Collier:
 JD>  All computers are running at Radio Frequency and generate 
 JD> Radio Frequency Interferance. (RFI) When they say "'486-66" 
 JD> they're talking about the machine running at 66 mhz. TV 
 JD> freqencies start at 150 mhz or so (I don't have a frequency 
 JD> allocation chart handy), but the first harmonic of 66 is 132, 
 JD> so it's getting close.
Nope,  channel 2 is 54-60,  3 is 60-66,  etc. on up to 6.  There's a bit of a 
gap between 4 and 5,  something else was in there already before tv got 
started,  and a *real* big gap between 6 and 7,  which contains the FM radio 
band,  some aircraft stuff,  and assorted other services.  From 7-13 they're 
pretty much adjacent and then there's another gap until UHF kicks in from 14 
on up.
 JD> Eliminating RFI is the subject of many books, but the basics 
 JD> consist of placing the emitter (the computer) inside of a METAL 
 JD> enclosure (metalized plastic counts) that is all connected 
 JD> together in one piece electrically, then grounded. That means 
 JD> that all the screws need to be in the cover, the extra 
 JD> expansion slots need to have covers, the expansion boards need 
 JD> to have screws installed, etc. If you return the machine to the 
 JD> configuration that you received it in, or as close as possible, 
 JD> you should be on the right track. Computer manufacturers spend 
 JD> LOTS of money to get these things certified with the FCC, and 
 JD> when you ignore the above points, you're sure to make the 
 JD> machine exceed allowable emissions.
You left out cables,  which are many times the problem too.
email: roy.j.tellason%tanstaaf@frackit.com 
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