Adjust LP12 speed the hard way:
One way to adjust the speed on an LP12 is by altering the tilt angle on the motor pulley. This is accomplished by loosening/tightening the two adjustment screws next to the pulley. These screws contact the motor casing and, by loosening/tightening, will tilt the motor (and pulley) for minor speed adjustments. A small amount of adjustment goes a long way, and you must first loosen one of the set screws before tightening the other in order to avoid deforming the motor casing. You need a strobe disk to check the result. The results are not ideal, and ongoing belt and pulley wear make the speed fluctuate.
Adjusting the easy way:
The good news is that there is a much easier way. Simply fit a Zeus or Minos motor PSU to your Linn Sondeck. The Minos allows precise speed adjustment at both 33.33 rpm and 45 rpm via simple software settings. Even better control can be achieved with the Zeus controller – this actually continually measures the platter rotation and keeps the speed rock solid. The Zeus can account for belt, pulley, motor and bearing wear. Your ears will thank you, and you won’t believe the difference.
