Diode Gate B142

This document is a technical schematic for a Diode Gate circuit (B142) produced by the Digital Equipment Corporation in 1967. The circuit features seven parallel channels, each consisting of a DEC 3639-1B transistor paired with two D662 diodes. The design includes various input/output points (labeled A through V) and utilizes standard resistors and diodes as specified in the included conversion chart. The schematic is intended for test and maintenance purposes.