Power Supplies

This document provides specifications and technical details for the Digital Equipment Corporation Type 783 and 783A power supplies. The units are designed for general systems use in standard 19-inch racks and provide +10V and -15V DC outputs. The document includes:

• Electrical Characteristics: Operating voltage, current limits for single and dual output loading, line/load regulation parameters, and ripple specifications.
• Mechanical Characteristics: Physical dimensions, finish, and terminal connection information.
• Technical Data: A simplified schematic diagram and a combined load operating region graph to determine output limitations based on the equation 5(I10) + 6(I15) = 53.

The 783A is noted as being identical to the 783 but equipped with a 50-cycle transformer. The document concludes with a full schematic and a note on required loading (at least 1.0 ampere on the -15V channel) for proper regulation.