[Boatanchors] Feb 1964 CQ?

[Wilson Lamb]

Yep, get with Jim Hanlon.  He has doc about it from about 1920.
WL
----- Original Message ----- 
From: "LM Picard" <lmpicard at allstream.net>
Cc: "'BoatAnchors'" <boatanchors at puck.nether.net>
Sent: Sunday, February 20, 2011 4:09 PM
Subject: Re: [Boatanchors] Feb 1964 CQ?


>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
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