Description & Operation: Transducer

The transducer provides the servo unit with controlled vacuum which will maintain driver selected speed. If vehicle speed drops, the transducer supplies less air bleed, and vacuum in servo increases to open the carburetor throttle valve. When vehicle speed increases, air bleed increases and vacuum in servo drops to close carburetor throttle valve. The transducer also drives the speedometer. The speedometer cable from the transmission drives the transducer, which drives a second cable within the unit at a one-to-one ratio.