For example, see https://www.youtube.com/watch?v=SH9OtgAcV6g.
Well done!
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.
Clearly, an issue with rechargeable batteries based on lithium is availability as lithium is a rare earth, so resources are limited. CATL ha...
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