R602

This document is an electronic schematic for a Digital Equipment Corporation (DEC) Pulse Amplifier, model R602 (R602-0-1, Revision R), copyrighted 1964.

It is provided for test and maintenance purposes and is noted as proprietary. The schematic details the circuit design, featuring multiple transistors (Q1-Q4), numerous diodes (D1-D50), resistors, and capacitors. It appears to be a multi-stage amplifier with various input/output connections (e.g., D, L, E, V, O, H, P, S, A+10V, B-15V, C,N GND).

Standard component specifications are given for resistors (1/4W, 5%), capacitors (MMFD), and diodes (D-664), unless otherwise indicated. A "Transistor & Diode Conversion Chart" maps DEC part numbers (e.g., DEC3639C, D662, D664) to their EIA equivalents (e.g., 2N3639, 1N645, 1N3606). The document also includes a revision history.