R613

This document is a schematic diagram for the Digital Equipment Corporation (DEC) Pulse Amplifier R613.

Key information includes:

• Purpose: Intended for test and maintenance purposes only; the circuits are proprietary to DEC.
• Copyright: Copyrighted in 1966 by Digital Equipment Corporation.
• Circuit Details: The schematic outlines the interconnections of various electronic components including transistors (Q series), diodes (D series), resistors (R series), and capacitors (C series). It shows multiple amplifier stages or channels, with connections to +10V, -15V, and ground.

• Component Specifications: Default specifications are provided:

  • Resistors: 1/4W 5%
  • Capacitors: MMFD (Micro-microfarad, now typically picofarad)
  • Diodes: D664 (EIA equivalent IN3606), D662 (EIA equivalent IN645)
  • Transistors: DEC 3639B (EIA equivalent 2N3639), DEC 2894-2B (no EIA equivalent listed).

• Identification: The document is identified as R613-0-1, Revision C, with a printed circuit revision B.