I am interested in creating a 78 rpm PL12-D. I believe an easily reversible way of doing this would be to have a new spindle made with a diameter of 0.87cm. I base this on a pulley conversion of 1800rpms (@60 cycles) for the motor (is this correct?) and a platter pulley size of 20 cm.
This new spindle would replace the existing unit that is on the motor shaft.
If this works I could then create a spindle of 0.37cm and 0.87cm to allow the use of the lever arm to switch between the two.
Any other thoughts on how to convert the PL12-d to 78 rpm use?