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mark_in_manc · 6th Jul 2019, 11:00 am

Are you sure it is a 115v mains-synchronous clock (and if so is it for 60 or 50Hz supply?) All the IBM (or ITR - International Time Recorders, a name they also used) clocks I have seen are a master-slave arrangement, with the slaves (as I remember) on 24dc, one-per-minute pulses. I have some set up here.
cheers
Mark

(Those question aside - if it were mine I think I would make a slim cupboard to hang on the wall and mount it on the front of).

6th Jul 2019, 11:00 am	#2
mark_in_manc Octode Join Date: Nov 2011 Location: Manchester, UK. Posts: 1,874	Re: Vintage ibm school clock Are you sure it is a 115v mains-synchronous clock (and if so is it for 60 or 50Hz supply?) All the IBM (or ITR - International Time Recorders, a name they also used) clocks I have seen are a master-slave arrangement, with the slaves (as I remember) on 24dc, one-per-minute pulses. I have some set up here. cheers Mark (Those question aside - if it were mine I think I would make a slim cupboard to hang on the wall and mount it on the front of).