Sold For $3,438
*Includes Buyers Premium
Apollo Command Module (Block II) Thrust Vector Servo Amplifier (TVSA), measuring approximately 12.5˝ x 5.75˝ x 6˝, with a Honeywell label on the side: "Servo Amplifier, Thrust Vector Position, NAA/S & ID Control No. ME901-0708-0202, Mfr Serial No. 10028AAG1020, Mfr Part No. B028805, Contract No. M7J7XAH-470005A, Mfr Date 14 March 1969." Four ports on the top are labeled "J1" through "J4."
The TVSA was part of the Apollo CSM Block II’s Stabilization and Control Systems, a backup system to the PGNCS (primary guidance, navigation, and control system) that can sense and control spacecraft attitude and velocity changes during flight. The SCS is located in the command module and consists of a reaction jet and propulsion solenoids driver assembly, electronics control assembly, electronics display assembly, gyro display coupler, thrust vector position servo amplifier, two gyro assemblies, and various displays and controls. The SCS can hold the spacecraft to a local vertical attitude during earth or lunar orbit by using orbital rates, or to a specific attitude by using reference gyros mounted in the spacecraft. Information about spacecraft attitude and rate of attitude change is displayed to the astronaut. Steering and thrust signals can be sent to operate the reaction control and service propulsion systems.
