What signal strength level on your plot indicates an 'opening' on 72kHz? Does the Rugby RTTY station on 73.2kHz follow the same pattern? Peter, I can't answer these questions now but hopefully we wil
Dexter, your HBG plot is most interesting and shows a greater stability of signal strength over the night period than on 136kHz. This implies that a cross-band QSO/HF would be possible even with the