[Boatanchors] Feb 1964 CQ?
lmpicard at allstream.net
Sun Feb 20 16:09:32 EST 2011
I thought that AT&T used SSB with pilot carrier for telephony on their
long lines before it was ever popular for RF comms.
Chuck McGregor wrote:
> The big advantage to DSB is that you can use a Costas Loop detector to
> regeneraate the carrier for automatic synchronization - no BFO drift,
> no duck talk. This was a big advantage with the drifty radios that
> were common before the 1950's. SSB wasn't very satisfactory until
> Art Collins proved that a sufficiently stable receiver could be built.
> --Chuck N7RHU
> Boatanchors mailing list
> Boatanchors at puck.nether.net
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