Hi, This sounds like a 'hum loop' problem, the scourge of audio enthusiasts. In effect there are two earth connections between the KX3 and PC and it forms a small loop aerial where by it picks up mains interference. You could try running the cables from the KX3 to the PC very close together. It doesn't affect most people but I did get this problem a bit ago, but not with my KX3. The solution for me was to fit two small audio isolation transformers (one for each channel) in the IQ line, fitted in a small project box, and the problem went away. This has long been the recommended procedure for most audio lines between a PC and a rig.
Hope this helps. Andrew G8BYB -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Enzo Adrian-Reyes Sent: 31 August 2016 08:43 To: Elecraft List Subject: [Elecraft] RX IQ USB Noise HI all Me again, I have a problem with my setup and trying to work out what is wrong. I have a handy video, which shows my problem: https://www.youtube.com/watch?v=hZPYUVpqefI I hope somebody knows how to fix this, I've tried different USB hubs, different laptops even. I havent tried a different sound card though but then again I don't want to keep throwing money at a problem unless there is a less expensive way to fix this. Regards VK3FRAD ______________________________________________________________ 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 Message delivered to [email protected] --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ______________________________________________________________ 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 Message delivered to [email protected]
