Head I Ver G350

This document is a technical schematic diagram for a "Head I" Transistor & Diode Conversion circuit, dated 1975 by the Digital Equipment Corporation. It details the electrical layout and component specifications for a circuit board featuring numerous transistors (2N2904A), diodes (D672), resistors, and capacitors. The schematic includes a 28-pin connector interface and provides specific power supply requirements (+5V and -15V). Technical notes at the bottom specify component tolerances, including 680 ohm, 1/4W, 5% resistors and .01uF, 100V, 20% capacitors.