My desk in this case sits adjacent a wall, and there's only a shower on the other side of that wall. I did turn off everything in the vicinity of the desk and all the lights in the room (I've in fact heard a very similar hum from the switching power supply for my mixer, and my first thought was it was this that was being picked up), but I didn't turn off the computer on the other side of the room. In this case it will be easier to move the rig outdoors with a battery than it will be to turn that computer off for the moment. It would have to be an impressively/obnoxiously strong magnetic field from that side of the room to influence the transformers inside the rig 8 feet away, but it's worth trying and simple enough to rule it out.
Nick On Fri, 26 Apr 2019 at 14:51, Don Wilhelm <[email protected]> wrote: > In addition to operating from a battery isolated from the solar system, > I would recommend that you do a quick test - remove all cables from the > K3S except the power cable and a coax to a dummy load. Power down all > power supplies in your station, including any desk lamps. > Go into Transmit by tapping the XMIT button. > Is the hum still present? If not, then start connecting things to your > K3S one at a time, doing the same test after each thing connected. > > Of course, if the hum is present with nothing connected, contact > [email protected] - but I cannot imagine a hum with harmonics of 60 > Hz being induced if you take away all the 60 Hz operated sources in the > area. > > 73, > Don W3FPR > > -- *N6OL* Saying something doesn't make it true. Belief in something doesn't make it real. And if you have to lie to support a position, that position is not worth supporting. ______________________________________________________________ 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
