[Elecraft] Noise when plugging kx3 into computer

[Mike K2MK]

It could be the laptop's external power adapter. Try using the laptop on its
internal battery and see if the noise abates. If it does then perhaps some
clamp-on ferrite cores on the power adapter cable(s) will reduce or
eliminate the noise. A slightly over sized core will allow you to wrap the
cable through several times.

73,
Mike K2MK


AB1SX wrote
> Never noticed it because while setting up the kx3 I was also setting
> everything up on my computer.  I am a new ham and was getting the logging
> software etc all set up.  I recently was using the kx3 without the
> computer plugged in and the computer was on the other side of the room.  I
> had very little background noise on the kx3.  I finished up what I was
> doing on the computer and brought it back to the kx3 (computer was still
> on) and I started getting back ground noise, when I plugged it in the
> noise even got louder?   I then took the computer away from the area and
> the noise disappeared again?  What's up with that?  Everything is
> grounded.  Could it be because I am plugging the lap top into the same
> plug outlet as my remote power?  The KX3 is set up as a base station in
> the house, remote power source, kx3, antenna tuner and 150 watt amp.  Is
> there a way I can stop that noise through filters on the kx3?  
> Suggestions would be apprciated.
> 
> AB1SX





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