G062

This document is a schematic diagram for a Peak Detector, model G062, developed by Digital Equipment Corporation (DEC) and copyrighted in 1970.

Key information:

• Purpose & Confidentiality: The schematic is proprietary, intended solely for test and maintenance purposes.
• Circuit Design: The main circuit features multiple repeating stages, each primarily comprising two transistors (DEC 6531 and DEC 6534B), a diode, various resistors, and capacitors. These stages likely represent individual peak detector channels or cascaded detection elements.
• Power Supply: The circuit operates using +5V and -15V power rails, with large decoupling capacitors (100µF, 20V) shown for these supplies.

• Component Specifications (General & Specific):

  • Resistors: Generally 1/4W, 5% tolerance.
  • Capacitors: Generally 0.01µF, 100V, 20% (note), though many on the schematic are specifically 1000pF, 250V.
  • Transistors: Identified as DEC 6531 and DEC 6534B, with a conversion chart providing EIA equivalents (MPS6531, MPS6534). A general note also lists DEC 30098 (EIA 2N30098).
  • Diodes: Identified as D664, with a conversion chart providing the EIA equivalent (IN3606).

• Revisions: The document is at Revision D.