VARIABLE DELAY LINE

This document contains a circuit schematic for a Variable Delay Line (B312-0-1) dated November 21, 1966. It includes:

• Circuit Diagram: A detailed layout of components including transistors (DEC3639B), diodes (D664), resistors, and a delay line (ESC No. 73-63, TD=250NS, Z=500Ω).
• Conversion Chart: A Transistor & Diode Conversion Chart mapping DEC proprietary parts to industry-standard EIA equivalents (e.g., DEC3009B to 2N3009).
• Technical Specifications: Notes regarding component tolerances (resistors 1/4W, 10%; diodes D662).

This schematic is designated as proprietary to the Digital Equipment Corporation.