Ed wrote:
On opening it up I found that the circuitry includes a 74LS73 dual JK FF, and a 74LS140 - very obscure - apparently a dual 4-input gate of some sort.
AFAIK, the '140 was only supplied in the "S" series (74S140). It's a dual 4-input NAND 50 ohm line driver.
Best regards, Charles _______________________________________________ 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.
