H720 Power Supply and Mounting Box Manual

This document provides a comprehensive technical manual for the Digital Equipment Corporation H720 Power Supply and the PDP-11 System mounting boxes.

The manual is divided into four main sections:

• Introduction: Provides an overview of the hardware and scope of the documentation.
• Power Supply: Details the theory of operation for the H720 power supply, covering AC power distribution, regulated and unregulated DC supply, and the operation of circuits such as the +5V and -15V regulators, overcurrent protection, crowbar circuits, and AC/DC "LO" logic.
• Mounting Box: Describes the modular concepts for housing PDP-11 systems, including basic and extension mounting box models.
• Installation: Covers planning, physical requirements, environmental considerations, and step-by-step procedures for setting up PDP-11 systems.

The final section of the document includes detailed data sheets for various system configurations, including rack-mount and table-top models, teletype units, cabinets, and specific technical specifications for different versions of the H720 power supply. It also includes a reader comment form to facilitate user feedback.