Computer causing interfance in HF radio's

[AA5JJ]

I am getting computer interfance in my shack for one computer's the others do not seem to bother anything at all. I run 10 through 80 meters alot and if I turn on this one computer it causes noisy in my HF rig that runs the S meter up to a S5 or more making it hard to copy normal stations. I have 2 HF rigs and it is doing the same thing to both of them, one is a Yaesu FT-920 and the other is a Kenwood TS-2000, I have everything grounded and have moved things around and nothing changes. I can turn this computer off and the noisy goes away and I can receive very well then. I have a Laptop sitting right next to my HF rig and it does not bother it at all, I have turned the monitor off just to make sure it was not it but it is the comp[uter it's self. I have changed the mhz of the video card and that does not help eather, any sugestions will be appreciated.
73 Wayne AA5JJ

[KE3GK]

Some computers are not put together as well as others, the government uses 'tempest' PCs to cut down on EMI/RFI ...

Here is a source that may help you solve your problem.

http://www.ac6v.com/comprfi.htm

[KD1UJ]

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