I didn't think is was LEGAL to transmit music, "tones" or
even whistle for
that matter.
Tones are legal for specific purposes like adjustments.
It's easy to adjust normal SSB to proper tuning by listening
to the voice. Voices contain harmonically related
frequencies that sound odd (out of tune for harmonics) when
improperly tuned. There isn't any need for anything except
careful listening while tuning and almost anyone who isn't
totally tone deaf can adjust for perfect frequency.
I'm wondering if the artificially exaggerated bass and
treble used by some ops doesn't mask the beats normally
heard with flat speech response and make it difficult to
tune the signal.
I don't think it is a bandwidth issue per se because the
normal SSB tuning procedure is to listen for the beats in
normal real-world harmonics of the human voice (or in
music). It is just as easy for me to tune a 25 kHz BW audio
signal as a 2 kHz BW when the response is flat across either
passband. Perhaps the exaggerated unnecessary lows and highs
(I can copy some ESSB stations on AM without even using a
BFO, so the exaggerated lows act like a carrier) mask the
normal frequency relationships in voices and make the
signals more difficult to tune. It may be a self-created
problem by the introduction of severe frequency response
distortion.
73 tom
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