Clip
The History of Record Speeds
25:12 - 28:01 (02:48)
This podcast discusses the transition of record speeds, from 78 revolutions per minute to 33 and a third, and the role gears played in stepping down the speed of a motor.
This podcast discusses the transition of record speeds, from 78 revolutions per minute to 33 and a third, and the role gears played in stepping down the speed of a motor.