A Rope Sense Amplifier Module from an Apollo Guidance Computer, 6.75″ x .75″ x 1.5″, with front marked in white stencil: "Rope Sense Ampf., Module B26-B27," with part numbers to left side: "NASA No. 1003154, REV J, MFG., By Raytheon Co., Serial No. Ray. 50." In fine condition. The Apollo Guidance Computer contained six core rope modules, each storing six kilowords of program information. A sense amplifier detects this signal and produces a binary output.
