June 2010 Recordings of signals at 3250KHz. Believed to be Pyongyang, Korea. The signals are slightly off-frequency, about 3250.03KHz. Now, Jan 2010 varying around 3250.04KHz.They follow the expected propagation  pattern. The AOKI list shows different language transmissions with the same power into a non-directional antenna, including a ten minute  break  although my observations do no quite coincide with the schedule, 21.50-22.00. This path does appear to be showing dawn enhancements. 

Note I have been playing with transmitting WSPR. My low power signals cause spikes on some charts but the overall picture is not affected. Around this time of the year signals are getting weak and the opening is short. Pyongyang dawn is before my sunset.

Understanding the Charts. 

Greyline Index Page

G4ZFQ Index page.