W693

This document is a schematic diagram for a "DEC to CTUL Line Driver W63," identified by drawing number W693-0-1, Revision D.

Key information from the document includes:

• Proprietary Nature & Copyright: The circuits are proprietary to Digital Equipment Corporation (DEC) and copyrighted in 1967, intended solely for test and maintenance purposes.
• Circuit Function: The title indicates it's a "Line Driver" circuit, likely used for interfacing between Digital Equipment Corporation (DEC) logic and "CTUL" (potentially a specific logic family or control line type).

• Component Details:

  • Transistors: Generally 2N4258. Specific transistors like Q1, Q3, Q5, Q7 are DEC 3009B, which cross-references to the EIA part number 2N3009.
  • Diodes: Generally D664, which cross-references to EIA 1N3606. Many specific diodes (e.g., D662 series) cross-reference to EIA 1N645.
  • Resistors: Unless otherwise indicated, they are 2,200 ohms, 1/4 Watt, 5% tolerance. Several resistors are explicitly labeled 100 ohms, 1W.
  • Capacitors: Includes C1 (.01 MFD) and C2 (1 MFD, 35V, 10%).

• Power Supplies: The circuit utilizes +10V, +2V, and -15V supply rails, with a Ground (GND) reference.

• Documentation Details: The document includes a revision history, a "Transistor & Diode Conversion Chart" mapping DEC part numbers to EIA equivalents, and was drawn on May 22, 1967.