"Carl R. Stevenson" wrote ...

The technical fact of the matter is that SSB is just about as efficient as
it gets for voice communications. The baseband (audio frequencies) are
translated to RF and back, with the result that the RF signal is no wider
than required to convey the baseband bandwidth. (unless, of course you're
running things into clipping and causing all sorts of intermod products)
While digital voice has some advantages in some applications (particularly
if one wants to use mixed media, such as VOIP links), even the best low-rate
codecs require a bandwidth at least as wide as SSB and at those coding rates
don't provide the same fidelity (speaker recognition, tonal quality, etc.)
due to the coding involved. Yes, SSB is at least 60 years old ... but Morse
is what? About 3X as old? Its not simply a matter of age ...
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So tell me, Carl -- if SSB is not obsolete (as you have so adequately
explained) then why do you think JJ thinks CW is? I mean it has all the
same attributes as your SSB explanation -- and with less bandwidth use and
lower power requirements. Seems pretty efficient to me.

Arnie -
KT4ST