Massachusetts Institute of Technology (MIT) Instrumentation Laboratory
4 x 6 1/2 x 14 in.
Object is a metal chassis bearing two 12BV7 vacuum tubes and a small circuit card with three transistors and some resistors, capacitors and diodes. On front panel is: a three-position rotary switch; two screwdriver-adjust pots; four, multi-turn, high-precision potentiometers; a small 10-pin jack. On back panel, a connector that is clearly a mate to connectors on the LINC rack-boxes in the same area.