DECtape Dual Transport

This document provides a comprehensive overview of the Model 555 DECtape Dual Transport. It describes the system's specifications, including its use of Manchester phase recording, bidirectional tape motion, and a redundant track layout to ensure data integrity. The manual covers theory of operation, describing the drive mechanism and relay-based motion control, followed by instructions for manual and automatic operation. It concludes with maintenance procedures, specifically detailing stop-time adjustments and cleaning recommendations for optimal performance.