gents unipolar slave clock

[duncan webster 1Participant @duncanwebster1]

Anyone know how long the pulse should be for one of these? I've got it going with a 240mA pulse 50ms long every 30 sec. It will work on shorter, but it sort of feels better at 50ms. In reality I don't suppose it matters, but it would be nice to know. I've tried Google and got nowhere

Edited By duncan webster on 14/11/2018 19:09:41

[duncan webster 1Participant @duncanwebster1]

[Martin ConnellyParticipant @martinconnelly55370]

Liverpool World Museum has a master and slave clock in their horology section. I don't know the maker but they do have a large background database for the section. They may be able to help. It's also worth a visit if you are ever in the area.

Martin C

[Brian HParticipant @brianh50089]

The BHI (British Horological Institute) is usually good for clock information, including electric ones.

Well worth a visit one one of their open days to see the original speaking clock (it still works)

Brian

[Jon LawesParticipant @jonlawes51698]

This might be useful

**LINK**

The electric clocks website supplies drivers for these clocks (a friend used one on a clock he got from Boscombe Down and asked me to wire it up).

[Jon LawesParticipant @jonlawes51698]

The options on the units he sells is 60, 120 or 240 mS

[duncan webster 1Participant @duncanwebster1]

Thanks Jon, I'll change it to 60ms.

Martin, I live close to Liverpool, and have stood next to their shortt free pendulum going 'how does that work then?' Next time I'm in L'pool I'll visit again. The new museum on the Albert Dock is not really worth a special trip, apart from a carriage from the Liverpool Overhead Railway and of course Lion from the L&M there is nothing of interest.

[Jon LawesParticipant @jonlawes51698]

Glad to help

[John HaineParticipant @johnhaine32865]

Try The Clockworks – brilliant.

[duncan webster 1Participant @duncanwebster1]

Changed to 60ms and it works even better. Less than 3.5 hours since posting the original query and it's sorted. Thanks to all

[Author]

Posts