> There is no verbage in Part 97 remotely resembling the term "Toll
> Quality" in terms of SSB or AM BW. We are allowed any SSB BW that
> we deem as "necessary", and I say it's 4k.
Part 97.307(A):
No amateur station transmission shall occupy more bandwidth than
necessary for the information rate and emission type being
transmitted, in accordance with good amateur practice.
With voice modulation, it has been proven repeatedly that 3 KHz is
more than adequate to reasonably reproduce the human voice with
sufficient intelligibility for communications service. *YOU* do
not get to determine the "necessary bandwidth." That is determined
by good engineering practice. If choose to use full carrier DSB AM,
the bandwidth necessary is no more than 6 KHz (+/- 3 KHz). +/-5
or +/-6 KHz is being a spectrum hog.
73,
... Joe, W4TV
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