Joe: In that time frame, there were a lot of "simulcast" analog radio, police, pager, and TV systems, where different broadcast transmitter locations transmitted the same information on the same frequencies. The goal was to have strong signals across a large (overlapping) combined coverage area.
For the systems to work with minimum interference in the RF signal overlap zones, the transmitters needed to be at slight, but precision offsets. These could have been master oscillators for those systems. An even better solution would have been to put them on the 'exact' same frequency and phase, but the digital electronics and GPS frequency/timing systems that could enable that, had not been deployed yet. 1979 :: No PC's, no cell systems deployed, microprocessors were eight bit, with clock speeds below 10 MHz, communication systems were mostly analog. Long time ago according to Moore's Law. https://upload.wikimedia.org/wikipedia/commons/0/00/Transistor_Count_and_Moore's_Law_-_2011.svg --- Graham / KE9H == On Sun, Mar 20, 2016 at 12:42 AM, Joseph Gray <jg...@zianet.com> wrote: > I got my hands on some of these. > > https://dl.dropboxusercontent.com/u/19599147/TCXO%20Top.jpg > > https://dl.dropboxusercontent.com/u/19599147/TCXO%20Bottom.jpg > > A search finds other Microsonics units, but not this one. I can't find > any information on what voltage to feed this. Does anyone know? > > I know that these aren't Time Nuts grade, but I am curious to see how > good/bad they are. They look to be NOS from 1979. > > Some of the other samples are marked as being set to anywhere from 1 > Hz to 7 Hz high or low. Why would they have been factory adjusted high > or low? > > > Joe Gray > W5JG > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.