Mike Chambers wrote:
I have an Eton E5 which I connect to my laptop via the Line Out on the
Eton to the Line In on the laptop.

This works great for recording shortwave broadcasts, but if the laptop
is plugged in, it generates some interference on the radio (only when
they are connected via lineout / in). If I unplug the laptop, there is
no interference.

Does anyone know if there is anything I can do to get rid of the
inteference? I want to set up my machine to record programs overnight,
so I can't leave the laptop unplugged.

mike

http://mesh.typepad.com

I hope I'm not asking the obvious, but are you closing the lid on the
notebook computer? That kills the noise from the LCD and CCFT.

Note that the switching supply puts noise on the power line, which in
turn is picked up by the radio. You can try to put the switcher on it's
own isolation, be it filtered power line strip or perhaps isolation
transformer.