Level Amplifier W513

This document is a technical schematic for the Digital Equipment Corporation Level Amplifier module W513 (Revision E), copyrighted in 1965. The circuit consists of seven identical transistor-based amplifier stages utilizing 2N3605 transistors and various D-664 diodes. The design is intended for use with solid-state DECtape TU55 units connected to relay drivers (models 550, 551, and 552). The schematic includes component values, a transistor and diode conversion chart, and standard configuration notes for maintenance and testing purposes.