W726

This document is a circuit schematic for a "SWITCH FILTER W726", designed by Digital Equipment Corporation and copyrighted in 1970.

The schematic illustrates a series of filtering circuits for various control switches. These include switch inputs such as "OFF SW", "MREW SW", "BR REL SW", "MFWD SW", "MREV SW", "START SW", "LOAD SW", "ON LINE SW", "OFF LINE SW", and "STOP SW", each providing a corresponding filtered output.

The circuit operates on +5V (A2) and -15V (B2) power rails and primarily utilizes resistors, capacitors, and diodes. General specifications are provided for components:

• Resistors: 1/4W, 1.2K, 5% (unless otherwise indicated).
• Capacitors: .01uf, 100V, 20% (unless otherwise indicated).
• Diodes: D003, IN750 (4.7V), and IN746 (3.3V). Specific component values are also explicitly shown throughout the diagram.

A "Transistor & Diode Conversion Chart" is included, listing equivalent parts for D003, IN746A, and IN750. The document notes that the schematic is furnished for test and maintenance purposes, is proprietary, and copyrighted by Digital Equipment Corporation.