G903

This document is an electronic schematic for a "CLOCK ACCELERATOR G903", created by Digital Equipment Corporation (DEC) and copyrighted in 1966.

The schematic details a proprietary circuit intended for test and maintenance purposes, featuring:

• Transistors: Q1-Q4 (DEC 3639, 2894-3B, 3568)
• Diodes: D1-D6 (D662, D664, IN758A)
• Resistors: R1-R11 with various values, with general specifications (1/4W, 5% unless otherwise indicated).
• Capacitors: C1-C4 (electrolytic and standard types, with voltage and tolerance).
• Input/Output/Power Connections: Including +10V (A), -15V (B), Ground (C), and various signal points (SO, R, T, H, J, L, M, N, P).

Accompanying the diagram are:

• A Transistor & Diode Conversion Chart linking DEC part numbers to their EIA equivalents (e.g., DEC 3568 to 2N3568).
• A Parts List reference (A-PL-6903-0-0).
• Revision information for the document (Rev. F) and printed circuit board (Rev. E).
• Drawing details, including the designer (N. Perryman, March 2, 1966).