Restoring vintage radio/record player. Record player plays only 78’s. Motor for player is 115 vac at 60hz. I need to slow down motor so that platter spins at 33 rpms for 33 records. I have been told an in-line switch with resistors to step down voltage but is 115 to high for resistors? Won’t they over heat? I have also seen light dimming switches installed to accomplish this for similar motors just not record players. Thoughts???