I have been able to kill my computer noise to my K3 by putting a USB hub between my computer and the USB to serial converter to my K3.
It is worth a try as the hub was cheap and I discovered it by accident. 73 and good luck Ken W0CZ Sent from my iPad On Apr 18, 2013, at 5:34 PM, Don Wilhelm <[email protected]> wrote: > You said 'everything is grounded' -- but does that include the computer? > Laptops may be difficult to ground because of plastic cases, but perhaps a > screw somewhere in the enclosure can provide a grounding point. The key is > not necessarily 'grounding', but instead bonding all components (including > the computer) with large diameter wire or braid to keep everything at the > same potential. > Plugging the computer as well as the ham gear into the same AC receptacle is > a potential assist to the situation, but as you have observed, it is not a > total cure. > > Check the RFI information provided by K9YC at > http://www.audiosystemsgroup.com/K9YC/K9YC.htm, it is an excellent resource > for such problems. > > You could try using the 8 kHz RX shift on the KX3 to see if that helps - > again, not the 'cure' but it can assist. Replacing the computer (or its > power supply) may be the only alternative to truely 'fixing' this problem. > > 73, > Don W3FPR > > > On 4/18/2013 5:33 PM, 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-tp7572783.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:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
