This image is at http://www.solen.info/solar/images/cycles23_24.png.
See https://arxiv.org/abs/1808.04868
See https://arxiv.org/abs/1808.04868
10 Nov 2018
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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.
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