I believe that SSB was in use even before 1920. The Bell System used SSB in FDM Mux equipment (C-carrier, etc.,) in the "10's" (1915 and later). This was between 4.5 Khz and 60Khz. As FDM technology improved the frequencies in use increased into the megahertz range. I have some modern FDM gear in my storage unit. Goes from 34Khz to 200Khz. I'd love to modulate a 900 Mhz link with that!
Ed, VA3ES --------------------------------------------------------------------------- Don k4kyv wrote: The first commercial use of SSB was around 1920 for transatlantic telephone links using VLF. ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
