Simple QRP projects, 10m, 6m, WSPR beaconing, LF/MF, sub-9kHz, nanowaves and other random stuff
500 kHz was replaced in 1999 by the Global Maritime Distress and Safety System (GMDSS), which uses a combination of automated terrestrial and satellite communications.
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Although I have a linear PSU, I am thinking of getting a new PSU to complement the one I have. Although I mostly use QRP, it would be good ...