2x9 Data Mixer M172

This document is a technical schematic and parts list for the Digital Equipment Corporation 2x9 Data Mixer (M172), dated 1970. The schematic illustrates the electrical circuit design, utilizing DEC1074H50 integrated circuits, and includes a detailed parts list featuring components such as capacitors, resistors, and the etched circuit board. It also specifies operational parameters, such as voltage requirements (+5V and +3V) and pin assignments for the ICs.