Re: M4 Turret movement resistor puzzle.
When switching high current and or inductive loads it was usual to fit a mercury switch as then can cope with most "nasty" loads particularly when breaking high currents. They were also fitted in order to stretch the impulse to the turret movements to allow sufficient time for the slower movement to operate correctly. If it is of help I can post an image of one - when I can find my camera !
On 26/07/2021 20:21, John Hubert wrote:
Two points here. Firstly Robert (Bob) Miles book was compiled from the material he had available. There are quite limited records for Synchronome. It is possible he worked mainly from the hardware he had access to rather than detailed drawings and specifications.