In the late 70s I took a 6800 based micro I designed for Sidereal and developed "CTU - Chuck's Terminal Unit", a program that ran an autostart responder on 80 meters.
The computer ran 1000 non maskable interrupts per second. This powered Baudot send, receive, and distortion measurements. It also powered a software phase locked loop that synced to and decoded the WWVB signal. A loopstick with lots of turns and a trimmer fed into a FET gate makes for a very selective antenna. I also happened to have a 60 KHz crystal filter on hand. There weren't many switching power supplies back then and reception was passable. Today I have a Radio Shack clock that has great difficulty synching and two Oregon Scientific weather consoles that can't sync at all. -- Chuck Forsberg WA7KGX N2469R [email protected] www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc "The High Reliability Software" 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
