Positive Level Converter W514

This document is a technical schematic for a Positive Level Converter (model W514) manufactured by Digital Equipment Corporation in 1967.

The circuit diagram details the configuration of transistors (2N4258), diodes (D664), resistors, and capacitors used to convert logic levels. It includes a conversion chart for transistor and diode types, specifies component tolerances (resistors are 2,700 ohms, 1/4W, 5%; capacitors are .01 MFD), and includes power input requirements of -3V, -15V, and Ground. The document is marked as proprietary and intended for test and maintenance purposes.