W514

This document is an electrical schematic for a proprietary "Positive Level Converter W514," copyrighted by Digital Equipment Corporation in 1967. It is explicitly stated that the schematic is furnished solely for test and maintenance purposes.

The circuit primarily consists of:

• Transistors: 2N4258 (all unless otherwise indicated).
• Resistors: Generally 2,700 ohms, 1/4W, 5%, though several input resistors are specified as 100 ohms (e.g., R1, R2, R12, R14, R24, R26).
• Diodes: Generally D664 (EIA IN3606), but some, like D13-D16, are D662 (EIA IN645).
• Capacitors: Generally 0.01 MFD (e.g., C1, C2, C3).

The converter features multiple inputs (E, H, K, P, S, M) and outputs (D, F, J, N, R, L), indicating it likely processes several signals or converts between multiple logic levels. It operates across multiple power supply rails, including GND, a positive voltage (+V), -3V, and -15V.