50 Ma Indicator and Relay Driver M050

This document is a technical schematic for the "50 MA Indicator and Relay Driver," model M050, produced by the Digital Equipment Corporation in 1967. The schematic illustrates a circuit design featuring a series of transistors (Q1–Q12) and diodes (D1–D36) configured to act as indicators and relay drivers. Included in the document is a comprehensive parts list detailing the specific resistors, transistors, and diodes required for the assembly, along with their respective part numbers and electrical specifications (such as resistance and wattage). The document serves as an engineering reference for test and maintenance purposes.