10 Bit D-A Converter A607

This document is a technical schematic for a 10-bit Digital-to-Analog (D-A) converter module, identified as A607, produced by Digital Equipment Corporation (DEC). The schematic, dated July 1967, details the circuitry for the converter, including an array of transistors (Q1–Q26), diodes (D1–D28), and various logic gates (E1–E5). It also specifies component values for resistors and capacitors, and provides notes on the selection of specific components to ensure operational accuracy.