M507

This document is an electrical schematic for the BUS CONVERTER M507, created by Digital Equipment Corporation (DEC) and copyrighted in 1968.

It is explicitly stated to be proprietary and intended only for test and maintenance purposes.

The document includes:

• A detailed circuit diagram featuring 18 transistors (Q1-Q18), 22 diodes (D1-D22), 31 resistors (R1-R31), and 10 capacitors (C1-C10). The circuit utilizes +5V, -15V, and Ground power rails, with intermediate voltage points at -0.7V, -1.5V, and -3V.
• A Bill of Materials (BOM) section listing component designations, descriptions (e.g., transistor type, resistor values, capacitor types), and corresponding DEC part numbers.
• A Transistor & Diode Conversion Chart providing EIA equivalents for DEC part numbers.
• Administrative details such as the drawing number M507-0-1, Revision E, and the drawing date of August 24, 1968.