> 3) The filter system lent itself easily to transceiver > implementations. This greatly reduced size, power consumption, cost > and complexity, because the same oscillators could be used for both > transmit and receive. Also, the task of zeroing the transmitter was > mostly eliminated. (Trivia: what was the *first* manufactured HF SSB > amateur transceiver?)
The earliest I can recall was the Collins KWM-1, introduced in 1957, but I suspect that may not be the correct answer. Transceivers of any sort were not common in the mid-1950s. My high school principal (K6AHL) had the first SSB setup I ever saw, a Collins KWS-1 transmitter with the matching 75A4 receiver, circa 1955. -- Bob Nielsen, N7XY n7xy (at) n7xy.net Bainbridge Island, WA http://www.n7xy.net _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
