W800

This document is a schematic diagram for the RELAY W800 circuit, copyrighted in 1965 by Digital Equipment Corporation.

Key Information:

• Purpose: Furnished for test and maintenance purposes; circuits are proprietary.
• Circuit Description: The schematic depicts two primary relay driver circuits. Each features a transistor (Q1, Q2 - DEC6534D/MPS6534) driving a 12V DC Wheelock relay (K1, K2, model 262-2A-XI).
• Components: The circuit includes various diodes (DEC D662/IN645, DEC D664/IN3606), resistors (generally 1/4W, 5%), inductors (L1, L2 - Essex RFC-L, 10%), and capacitors.
• Power Supplies: The circuit operates with +10V (A), Ground (C), and -15V (B) power rails.
• Additional Details:
  • A "Transistor & Diode Conversion Chart" provides equivalent EIA part numbers.
  • References a "Parts List A-PL-W800-0-0."
  • The document is Revision D, with the drawing date listed as January 14, 1965.