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Simple QRP projects, 10m, 8m, 6m, 4m, FT8, 160m, WSPR, LF/MF, sub-9kHz, nanowaves and other random stuff, some not related to amateur radio.
When sunspot numbers and solar flux numbers are high, there is always a chance of the F2 MUF reaching 6m or even higher. I remember some ye...