Dear Mike, Hartmut, Roeloff and LF Group, congratulations again to Hartmut and Joe on the aural CW copy, this is excellent work. In my opinion, the rapid amplitude fluctuations seen by Hartmut are no
... rethinking after sending, I may have mixed up Doppler shift signs. A falling pattern (ie. HF to LF stripes) would be spectral components closing in on one another, meaning increasing delay, negat
Dear Alan, thanks a lot for commenting on this riddle. Yes the two hop versus one hop pattern is probably the most common source of multipath fading. But what keeps unresting my mind is that 10 milli
Hi Markus. I cannot believe a 10ms "delay" even if one path had managed to get through the E layer and up to the F layer and back the timing is not enough. HOWEVER dont forget that is an FSK signal w