The planetary gears, controlled by relays, provide mechanical movement of the tuner assembly as well as the dial pointer. When the Selector bar is depressed, a relay moves a brake away from the fly governor allowing the the spring to gradually unwind as the pointer moves toward the high-frequency end of the dial. During its travel and as the variable condenser senses a station frequency, the planetary mechanism will come to a halt, and the variable condenser will lock perfectly on a frequency eliminating the need for fine-tuning. When the variable condenser comes to the end of its travel, a solenoid is energized through contact points thrusting the planetary arm and pointer to the beginning of travel. The thrust of the solenoid in turn winds the spring-loaded gear, and the cycle begins again.