I don't think MagAmps were much used for logic, but Di-an made a family of core logic that would certainly work for the counters in a clock.
-John ============= > No one has remembered the magnetic amplifiers (C1960) that were > considered reliable enough for control avionics. > Vacuum tubes and semiconductors were not considered reliable. > > Back to the IC-less clock, I recently constructed a LED clock for a > TBolt. > To avoid the flicker effects and to get control of the LED intensity > I used BCD counters and > transistor drivers without multiplexing. BCD to hexadecimal was > arranged with diode decoding. > It looks half as big as the IC-less clock board with row after row of > transistors and resistors. > At least it will always show the correct time in a photograph. > > > cheers, Neville Michie > > _______________________________________________ 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.
