Binary to Octal Decoder B152

This document is an engineering schematic for a Digital Equipment Corporation Binary to Octal Decoder (B152). The circuit design utilizes a matrix of diodes and 2N4258 transistors to convert binary-coded inputs (labeled D through O) into an octal output format (M through V). The schematic specifies that all resistors are 7,500 ohms (1/4W, 5%) and all diodes are type D664. The document is dated May 17, 1967.