this'll move the toolmaster knee

GE DC servo. Specs: 70 Volts, 1725 RPM, 25.5 Amps, Field Volts 60 DC,
1.51 Amps, Frame 79AB. $32.50 new / surplus.

Of course it's not PMDC, so it needs DC to energize its field. How
clean should the DC be for the motor to be happy? Is a just a
rectifier lump enough?

Thanks.

--Jack