Ed, that is not correct. I think you are mixing up LSB and
USB. A USB signal with the suppressed carrier at 21200.5
KHz would be legal so long as the opposite sideband rejection
of the stations transmitter was greater than 40dB. The fact
that you can still hear that station when you tune your radio to
21199 is due to the fact that your receiver has finite bandwidth
and is listening from 21199 to 21202 (assuming nominal 3
KHz receiver bandwidth). On LSB, it would be a different story.
In that case you would need to have keep your carrier
frequency up around 21203 KHz to be legal (depending on
the exact -40dB bandwidth of your transmitter of course).
The most egregious thing I heard this past weekend was
when HG1S was listening split QSX at 7151 KHz on Saturday
nigh/Sunday morning. I was surprised by how many USA
stations called there him despite the fact that he was
announcing a QSX that was clearly out-of-band (you wouldn't
be able to understand an SSB signal that was only 1 KHz wide
at the -40dB points). In a somewhat less egregious example,
when I was cruising up the band on 20 meters working in
search and pounce mode Friday evening, I accidently worked
someone who was calling CQ at 14348.2 KHz before I looked
down at the display and realized that I was probably a good
1 KHz out of band (oops).
Mike, W4EF.....................................
> > All weekend in CQWW, a certain well-known M/M was camped on 21200.5,
> > and was of course audible down to 21199 or so.
>
> 2. And yes, if it was a US station, they were out of the band big
> time. Even on LSB,
> they would have been illegal.
>
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