Analog Computer - picture

Analog Computer - picture This is one of 2 cabinets of "operational amplifiers" used in the Nike analog computer, each group of 5 tubes is 2 (a pair of) operational amplifiers. You see the front of a swing out rack - other components are behind this rack. The brown boxes are "zero set switches", each with a "zero set amplifier" just above. The zero set equipment balances out tube differences in the operational amplifiers. Each "zero set switch" corrected or balanced 12 operational amplifiers. Behind these two racks are many relays used to control many functions in the computer, (test modes, timers, the burst command, etc.). Also in the racks behind are modulators and power amplifiers to drive the servo motor potentiometers and the plotting board motors.