Four Flip-Flops B214

This document is a technical schematic diagram for a "Four Flip-Flops B214" circuit module, produced by the Digital Equipment Corporation in 1967. The schematic illustrates a series of nine transistors (Q1–Q9) configured as flip-flops, interconnected with numerous D664 diodes and specific resistor values (ranging from 1,500 to 7,500 ohms). It details the electrical connections and power requirements (including +10V, ground, and -15V rails) necessary for the operation of the module. The note specifies that all standard resistors are 1/4W, 5% tolerance, and that the transistors used are 2N4258 models.