[Elecraft] Computer-noise

[Martin]

Hello elecrafters,
today i wandered through the house carrying the battery-powered K2
with a vhf antenna connected to ŽsniffŽ for the noise i have on 80 &
160m. On 160m, snap-on ferrites on 2 network-cables completely
removed the carriers. On 80m the problem seems to be more
difficult: The noise is produced by one of 3 Computers in my buro,
even when it is switched off. The other computers are quiet, also the
one in the shack.
The noise becomes a lot stronger when the computer is on, but only
completely disappears when it is disconnected from the mains.
Its a raspy carrier slowly sweeping up and down the band.

Any ideas where to start? A snap-on ferrite on the power-cord
helps a little, but not much.

  

-- 
Best regards,
 Martin DM4iM, ex DL1iAQ
K2 #2706                          mailto:dm4im at gdxf.de