[Premium-Rx] Cubic R-3036 dual MF/HF receiver info wanted
Charles Steinmetz
csteinmetz at yandex.com
Mon May 6 00:46:46 EDT 2019
Peter wrote:
> Isn't AM BCB stereo ISB? You could listen to that and see.
Sadly, no. The best (IMO) of the competing systems (Kahn-Hazeltine)
used ISB modulation, but during the "fight-it-out" phase, when a station
could choose any of the four systems, Motorola C-QUAM ("Compatible
QUadrature AM") became the de facto US standard (ratified by the FCC in
1993).
Good luck finding an AM stereo station in the US today. Last I knew,
WLS (890 Chicago) was still broadcasting in C-QUAM stereo. But in
reality, AM stereo faded into oblivion in the US before it ever gained
much of a following.
Best regards,
Charles
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