73445N Speed Regulator Modification Kit for Saber 3306 DC Drives

This document describes a modification kit (Model 73445N) for Louis Allis Saber 3306 DC drives, enabling speed regulation with separate proportional and integral gain adjustments using an AC or DC tachometer. It includes installation instructions, tachometer calibration procedures, and interconnection details for the Volt/Speed Main PCB and Relay/Interface PCB.