W612

This document is a detailed schematic diagram for a W612-YA-1 Pulse Amplifier, manufactured by Digital Equipment Corporation (DEC) and copyrighted in 1972.

It is explicitly stated as proprietary, intended solely for test and maintenance purposes.

The schematic illustrates the circuit, which includes numerous active and passive components such as:

• Transistors: DEC3639B, DEC6B, DEC30098-S (with conversion to 2N3639, 2N3646).
• Diodes: D662, D664, 1N750A (with conversion to IN645, IN3606).
• Resistors, Capacitors, and Transformers (T2021).

The circuit operates with multiple voltage rails, including +10V, -7.5V, and -15V, along with ground (GND).

The document also includes:

• A comprehensive Parts List detailing component quantities, reference designators, descriptions, and DEC part numbers.
• A Transistor & Diode Conversion Chart mapping DEC part numbers to standard industry equivalents (e.g., 2N-series, 1N-series).
• Information related to manufacturing and assembly, such as Module ECO History, Assembly/Drilling Hole Layout, and X-Y Coordinate Hole Location.