Telephone exchange master clock. No markings, numbers or labels apart from the “Gents” name plate.
Most likely purchased and installed by PMG Dept, C of A in early 1950’s. I expect it was used for timing local and STD calls.
I am keen to more closely identify it and find a detailed circuit diagram so that I can restore it.
Andy
I’m not sure it’s going to be that easy finding a wiring diagram as it’s not a common clock Having said that it’s a very simple clock with labelling on the tag so it’s not easy to go wrong . Also your multi meter is you best friend in these circumstances. I think a Gents 36 clock diagram is similar . Plenty of these on the net . Not sure of the voltage. Maybe it’s not to fussy as it got variable resistors to set the voltage up . If not sure start with a low DC voltage and work your way up Andy
Andy
Alan hi
Just looking at the main pictures again . I don’t think both of those resistors should be there . There is also a burn mark on top of the variable one . A bit strange as it shouldn’t be doing much and as I said I don’t think it should be there. Not in parallel or at all.
There is a small round inductor I believe in circuit I can see. I see the thumb screw but I’m not sure what it does. Best to leave it as it is if you can get it working.
One of the biggest problems with any clock is oil. So make sure everything runs freely.
I find so many clocks that stop or gum because people over oil. Andy