OT - 30.53 KHz carrier pulses on 40 meters

Posted by mike on
URL: http://elecraft.85.s1.nabble.com/OT-30-53-KHz-carrier-pulses-on-40-meters-tp7595650.html

I have been noticing a 1 second on / 1 second off carrier at 30.53 KHz intervals on 40 meters. For instance I just captured a P3 screen showing the pulse at 6.97681, 7.03788, 7.06841 and 7.09894 MHz. At first I suspect a new switching power supply, but the signals are still there when running off a battery. Anyone know what this might be? I am puzzled.  73  ..mike  AI6II