Relay W800

This document is a technical schematic for the Digital Equipment Corporation "Relay W800" circuit board (Revision D). It details a dual-channel relay driver circuit designed for use with 12V DC Wheelock relays (K1 and K2). The circuit includes two transistors (DEC6534D) acting as switches, associated resistors, diodes for suppression, and inductors/capacitors for filtering. The schematic specifies that it is intended for test and maintenance purposes only, noting that the proprietary designs are under copyright from 1965.