M517

This document is an electronic schematic for a "BUS CONVERTER M517", designed and copyrighted by Digital Equipment Corporation in 1970.

Key details from the document include:

• Purpose: It is explicitly stated that the schematic is for "TEST AND MAINTENANCE PURPOSES" and contains "PROPRIETARY" circuits.
• Circuitry: The schematic illustrates a complex electronic circuit featuring multiple stages of transistors (Q1-Q20), numerous diodes (D1-D30), various resistors (R1-R38), and a few capacitors (C1, C8, C9).
• Power Rails: The circuit operates with several voltage lines, including +5V, -15V, Ground, and internal -0.7V and -3V references.

• Supporting Information:

  • A Parts List provides detailed descriptions (e.g., resistance/capacitance values, wattage, tolerance), and part numbers for all components.
  • A Transistor & Diode Conversion Chart offers cross-references between DEC and EIA part numbers.

• Document Identifier: The drawing number is M517-0-1.