[Elecraft] Computer-noise

[Robert Tellefsen]

Martin
It sounds like the switching power supply is still active,
even when the computer is switched off.  I suggest an external
switch which can be used to completely kill the computer
until you actually want to use it.
Good luck and 73
Bob N6WG
The Little Station with Attitude

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Martin
Sent: Sunday, November 20, 2005 7:51 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] Computer-noise


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


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