Dear James and LF Group,
Your perception of being limited to some 100 Hz of overall bandwidth for
transcontinental LF work is unlikely to be the case in other continents.
Down here we have 165 - 190 kHz, and can even have LF SSB nets, and they
work fine. Limitation on emission bandwidth is probably the SWR bandwidth
of a typical backyard antenna, and nobody here who has tried SSB has had a
problem.
For digital modes, Shannon's Law is not limited to slow symbol rate, even if
the net recovered data is slow rate.
I still do not believe there needs to be an arbitrary cap of 10 Hz on
digital mode emission bandwidth. If someone can come up with a cunning
scheme that uses say 50 Hz bandwidth, then it why not use it?
Cheers,
Bob ZL2CA
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