Diode Gate

This document is a technical schematic for the Diode Gate B134, produced by Digital Equipment Corporation in 1966. It illustrates the circuit design for test and maintenance purposes, featuring a series of transistors and diodes (D664, D662) along with various resistor and capacitor configurations. Included on the document is a Transistor & Diode Conversion Chart, which provides equivalent part numbers such as 2N4258, 1N645, and 3N606.