This is actually covered already but I need to mention it. When the WSJTX waterfall started losing signals into the noise I noticed that there was a neat periodic set of signals that lined up with the frequency ticks. Eventually it dawned on me that they were 120 Hz apart and eventually I found a 60 Hz fundamental.
What I found is that the the line out was picking up the linear power supply that was behind it. What I also found out was that as the K3 got closer the the transmitter came on. So the magnetic field from the current spikes from the diodes in the power supply were being picked up line transformers in the K3. So I moved the power supply. Since the transformers get rid of ground loops I wouldn't complain too much. End of Story. PS it was really unnerving to move the K3 and have it turn on. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Hum-JT65-JT9-and-Vox-Resolved-tp7588936.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 Message delivered to [email protected]
