8 Track Matrix

This document is an engineering schematic for the G681 8 Track Matrix. It includes:

• A complete circuit diagram for the matrix, showing the arrangement of resistors (R1-R16) and diodes (D1-D16).
• A parts list identifying the specific resistors (750 ohm, 1/8W, 1%) and diodes (D672) used in the circuit.
• Revision history and drafting information, dating the schematic to 1967.