Negative Bus Converter

This document is a technical schematic diagram for the Digital Equipment Corporation (DEC) Negative Bus Converter, identified as drawing M531-0-1. It outlines the circuitry, including transistors, diodes, resistors, and capacitors, intended for test and maintenance purposes. The schematic includes a transistor and diode conversion chart and specifies the use of components such as DEC3009B transistors and D664 diodes.