Diode Gate B134

This document is a schematic diagram for a DIODE GATE BI34 circuit, identified as B134-0-1, Revision A, by Digital Equipment Corporation (DEC), copyrighted in 1966.

The circuit primarily features:

• Eight transistors (Q1-Q8), type 2N4258.
• Numerous resistors (various values, commonly 68k, 7.5k, 1.5k ohms), with general specifications of 1/4W, 5% tolerance.
• A significant number of diodes (D1-D31), mainly D662 and D664.
• Several capacitors (e.g., .01 MFD).

The circuit operates with power supplied at +10V, Ground, and -15V, and a -3V "STRATE" connection. A "Transistor & Diode Conversion Chart" provides equivalent EIA part numbers for the specified DEC components.

Important note: The schematic is proprietary to DEC, intended solely for test and maintenance purposes.