Interesting I did the same thing with my KX3 when I took it out on my rear deck and hooked it to my laptop. The first time I had noise also the second time I wanted to hook up another item and used the hub, surprise no noise.
At the time I thought it was just a fluke or was a onetime thing, I guess not. 73, Fred/N0AZZ K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100 P3/SVGA--KPA500--KAT500--W2 -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kenneth A Christiansen Sent: Friday, April 19, 2013 7:34 AM To: d...@w3fpr.com Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] Noise when plugging kx3 into computer 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 <w3...@embarqmail.com> 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-com >> puter-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:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2904 / Virus Database: 3162/6253 - Release Date: 04/18/13 ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2904 / Virus Database: 3162/6253 - Release Date: 04/18/13 ______________________________________________________________ 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
