On Sun, Apr 19, 2009 at 9:24 PM, Dr. Gerald N. Johnson <
geraldj@storm.weather.net> wrote:
> On Sun, 2009-04-19 at 21:19 -0400, Martin Ewing wrote:
> > On Sun, Apr 19, 2009 at 3:00 PM, Bob McGraw - K4TAX <RMcGraw@blomand.net
> >wrote:
> >
> > > ... And oh by the way, my AM transmitter doesn't use any more
> > > sideband bandwidth than current technology SSB rigs and in many cases
> it
> > > uses less.
> > >
> > > 73
> > > Bob, K4TAX
> > >
> >
> > I've been around since the AM era, myself, but I don't see how DSB AM
> > doesn't take at least twice the bandwidth of SSB for the same voice
> input.
> >
> > 73 Martin AA6E
>
> Except that some with dilusions of broadcast voice grandure transmit 6
> KHz or more of audio bandwidth.
>
> 73, Jerry, K0CQ
>
X kHz SSB -> 2*X kHz AM DSB (more actually, since there is some SSB bass
cutoff > 0 Hz)
Choose your X.
I wonder if anyone still does DSB suppressed carrier? That was a lot easier
to generate and still gave substantial power benefits over AM with carrier.
Poor man's SSB.
73 Martin AA6E
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