if you want to sync to mains.. this is what "mains" looks like

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Chopperp Guru Joined: 03/01/2018 Location: Australia Posts: 1110	Posted: 11:39pm 03 Dec 2024         Quote   the time standard was a pendulum clock adjusted regularly using the time beeps of the radio Ah, the old pendulum clocks. We had 2 in the old equipment room at Perth Airport back in the '70s when I stared as a trainee tech. (Clocks been there for ages prior) They fed 1 second pulses around the place:- Control Tower, Fire Station, OPs, Passenger terminals etc. Not sure if minute pulses were sent as well. At 8am every working day, we would tune into WWV (10MHz) to get the time pips to check their accuracy. No automatic DLS adjustment either when we did a trial over there one summer. Clocks being an our hour out caused some confusion to say the least. Fun resetting them. Brian     PS, playing silly buggers, some of us used to stand in front of the clocks & try to synchronize our arms with the two pendulums which were rarely in step.   Brings back some good memories. Thanks Jim.