Initial Transient Detector W504

This document is a technical schematic for the "Initial Transient Detector W504," a proprietary circuit designed by the Digital Equipment Corporation in 1966. The schematic details the electronic components, including transistors (such as the DEC 3009 and DEC 2894-3), various diodes (such as the D664 and D662), and a network of resistors and capacitors arranged to perform signal detection. The circuit operates between power rails of +10V and -15V and includes a "Transistor & Diode Conversion Chart" to aid in testing and maintenance.