Hi Markus , well we dont know all the answers even if it might seem like it sometimes Comments like yours trigger new ideas and a need often to revisit previous ideas and see whether they are still v
Hi Markus I think you are referring to the type of effect that often happens on 160m. I dont know the answer but I suggest that it might be difficult to get 136kHz into a duct and get it out again. L
Thanks Alan for this comment! Yes I wasn't all that serious when referring to it as a duct, I was just amazed by the degree of spatial selective fading at that instant. As Dex and Bill have mentioned