Steve G1KQH has made me aware of some very good deals on mics for under £10. If you need mics this may be worth investing in.
See http://www.gearbest.com/speakers/pp_193557.html
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.
It would appear that lithium-ion batteries look optimal for range and weight. The disadvantage is that lithium is a rare earth material with...
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