W681

This document is an electrical schematic for a Scope Intensifier, model W681-0-1 (Revision H), copyrighted in 1965 by Digital Equipment Corporation.

Key information includes:

• Purpose: Intended for test and maintenance, and is proprietary.
• Circuit Components: Features a detailed circuit diagram utilizing transistors (e.g., DEC 3639-B, DEC999, DEC3646-B), diodes (e.g., D-664, D-670, D-662), resistors (typically 1/4W, 5%), and capacitors (e.g., 56 MMFD).
• Power & Signal Connections: Various input/output points are identified, including +10V, -15V, Ground, and positive/negative signal lines.
• Component Specifications: Default specifications are provided for diodes (D-664), transistors (DEC 3639-B), and resistors (1/4W, 5%), unless otherwise indicated.
• Conversion Chart: A "Transistor & Diode Conversion Chart" lists DEC part numbers and their EIA equivalents.
• Documentation: Includes a revision history and references a parts list (A-PL-W681-0-0).
• Publisher: Digital Equipment Corporation, Maynard, Massachusetts.