February 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. After presumed Pyongyang fades away another signal fades in. This could be Honduras, R Luz y Vida, San Luís switching off at around 0401 (EIBI list). The step in the green trace of my chart shows it is lower in frequency, around 3250.025KHz. If the frequencies prove stable I could make a separate chart to show any possible dusk enhancement of this signal, if it does happen it shows on the waterfall..
Note I have been playing with transmitting WSPR. My low power signals cause spikes on some charts but the overall picture is not affected.