"Mike Chambers" wrote in message
news
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

How about a real long line in cable? I got lots less noise when recording into my laptop
when I could get the radio farther away.

Hello, you can also get some noise-reduction ferrite core, such as this :

http://www.shinemicro.com/images/ferritethumb.jpg

Perhaps you have some already clamped on some device's wire (digital
camera, AC/DC tranformer, modem, etc...).

If you can un-clamp one a clamp it on your laptop power wire OR audio
line wire, just check if it helps...

I did that on my AC/DC adapter of my SW radio, and it helps reducing (a
little) incomming RFI.

Charly

Thanks. That didnt seem to help any.

mike

On Thu, 04 Jan 2007 10:47:45 +0100, Charly wrote:


Hello, you can also get some noise-reduction ferrite core, such as this :

http://www.shinemicro.com/images/ferritethumb.jpg

Perhaps you have some already clamped on some device's wire (digital
camera, AC/DC tranformer, modem, etc...).

If you can un-clamp one a clamp it on your laptop power wire OR audio
line wire, just check if it helps...

I did that on my AC/DC adapter of my SW radio, and it helps reducing (a
little) incomming RFI.

Charly

Talk to some people at a local radio station,or tv station.They might
have some good tips.I know some radio and tv stations record programs to
computer files/data.
cuhulin

Mike,

I had the same issue, and when I first attempted it I clamped it
straight ono the cable and still had noise "BUGGER!!". This is when I
read some where to coil the cable to form 3 loops / turns about 3-4
fingers wide and I clamped two ferrite cores from RS.

That did the trick and the noise is 100% gone.

Hope that helps.

Regards
Mark


Mike Chambers wrote:
Thanks. That didnt seem to help any.

mike

On Thu, 04 Jan 2007 10:47:45 +0100, Charly wrote:

Hello, you can also get some noise-reduction ferrite core, such as this :

http://www.shinemicro.com/images/ferritethumb.jpg

Perhaps you have some already clamped on some device's wire (digital
camera, AC/DC tranformer, modem, etc...).

If you can un-clamp one a clamp it on your laptop power wire OR audio
line wire, just check if it helps...

I did that on my AC/DC adapter of my SW radio, and it helps reducing (a
little) incomming RFI.

Charly