Negative Level Converter W511

Summary This document is a technical schematic for the Digital Equipment Corporation "Negative Level Converter W511," dated 1966. The circuit is designed to interface electronic signals, utilizing four transistors (DEC3009B and DEC2894-IB) and a variety of diodes (D662, D664, D670) to perform level conversion. The schematic details the wiring, power inputs (+10V and -15V), and resistor values (ranging from 1,500 to 15,000 ohms) required for the module's operation. It also includes a transistor and diode conversion chart for cross-referencing proprietary DEC components with industry-standard part numbers (e.g., 1N645, 1N3606).