Transistor and Diode Conversion Chart

This document is a technical schematic and parts list for a 24-level terminator and thermistor circuit, produced by Digital Equipment Corporation in 1971.

Summary:

• Circuit Design: The schematic depicts three diode matrix blocks (labeled E1, E2, and E3) using D662 diodes and DEC2501 ICs. These circuits are designed to facilitate level termination, utilizing a +5V source and capacitors for filtering.
• Components: The design incorporates resistors, capacitors, and a thermistor (1K at 75°F).
• Parts List: The document includes a table identifying the specific components required, including the printed circuit board, various capacitors, 15 D662 diodes, 3 DEC2501 ICs, and the thermistor.
• Purpose: This board is designed for signal conditioning or termination within a larger Digital Equipment Corporation system, providing the necessary electrical stability for interconnected hardware.