I just picked up a copy of the June CQ in the airport bookshop and p.28
has a sidebar by K2MGA (CQ Publisher) on the history of SSB:
Regardless of how the SSB signal was
generated, the 455 kc USB signal was mixed up
to 9 Mc. Using a converted war-surplus
BC-458 transmitter...as a VFO, the
4.0 to 5.3 Mc output was either added
to or subtracted from the 9Mc SSB
signal. That produced a USB signal on
20 meters or an LSB signal on 75 meters.
(That's the origin of the world-wide
convention: LSB below 20 meters; USB on
20 meters and up. ..)
On Thu, 17 Jun 2004 5:37pm, [EMAIL PROTECTED] wrote:
No, that's just not true. Urban legend.
...
Now if you use a 5 MHz SSB generator and a 9 MHz VFO you *do* get
sideband
inversion.
73,
WA5ZNU Leigh
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