Master Drawing List

This document serves as a comprehensive Master Drawing List for Digital Equipment Corporation's (DEC) LT33 series Teletypewriters, providing a central index and detailed technical drawings for various models and modifications.

The first page functions as an index, detailing individual drawings by their revision, sheet count, and specific titles such as "Reader Control Circuits," "PDP10 Teletype Model 33 KSR," "Teletype Modifications," and "Maintenance Tool Kit 33 ASR." It also specifies which unit variations (e.g., LT33-AA, LT33-BB) utilize particular options or drawings.

The subsequent pages contain detailed technical specifications, wiring diagrams, and parts lists for critical modifications and configurations. These include:

• General Teletype Modifications (LT33): Instructions for electrical and mechanical changes, including cable connections to terminal boards and the installation of thyractors.
• 50 Hz & 240V Teletype Modifications: Specific adjustments required for operating Teletypewriters on different frequencies and higher voltages, encompassing transformer wiring, motor, and gear replacements.
• Timesharing Teletype 33 ASR (TY) & PDP10 Teletype 33 KSR: Wiring and modification procedures tailored for timesharing applications and integration with the PDP10 system, detailing full duplex operation, terminal strip connections, and specialized component installations.
• PDP 10 Teletype Model 33KSR Schematic: A detailed circuit diagram illustrating reader control, printer, and keyboard loop functionalities, and signal paths.

Overall, the document provides essential instructions and visual aids for the correct configuration, modification, and maintenance of the LT33 Teletypewriter systems across various operational environments and system integrations.