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 -- View this message in context: http://elecraft.365791.n2.nabble.com/Noise-when-plugging-kx3-into-computer-tp7572783p7572784.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
