"Nacho" wrote in message
...

[snip]


Can you give me some recommendations about them? I want to buy some big
and some small (if they are cheap, I don't know the price). For the
keyboard of my brother's computer, with one cylindrical the noise
disappears (it is two rooms far) but my computer needs more with one
cylinder the noise is reduced but doesn't disappear, as it is much nearer.

Any recommendation will be great.


Thanks a lot.


Marlin P Jones offers several split core ferrites:

http://www.mpja.com/listitems.asp?dept=157&main=110

They are more expensive at Radio Shack:

http://www.radioshack.com/search.asp...search&SR C=1

Frank Dresser