Hello, I have been hearing an annoying noise on 160m that has a pulse rate of about 1/3 of a second. After observing the behavior when I do certain things with my K3 and my computer I found that the source of the pulsing is Ham Radio Deluxe polling the K3 for VFO changes -- it polls every 300ms. However, when HRD is shut down (no other serial port activity) the noise is still present as a constant tone with no pulsing effect. My first suspicion is the USB to Serial adapters on the computer, but I am also thinking that maybe the noise is coming from the USB hubs or their wall warts. I can hear the noise on the K3, my winradio, and my handheld (which is picking up the noise on 80m). I was wondering if anyone has seen something like this and whether this might be coming from inside the computer or the USB hubs. I am going to pull out my desk from the wall and start tracking this down to the source but I wanted to see if anyone else had experience with this sort of thing and any thoughts or recommendations?
Best Regards, Mitch Mitchell AE5HO [email protected] ______________________________________________________________ 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
