W005

This document is a schematic diagram titled "CLAMPED LOADS W005", produced by Digital Equipment Corporation in 1964.

Key information from the schematic:

• Purpose: It is furnished for test and maintenance purposes and contains proprietary circuit information.

• Circuit Description: The schematic illustrates a circuit with two main sections:

  • Input Load Section: Consists of multiple parallel diode-resistor pairs (D1-D15 paired with R1-R15). Each pair connects an input point (e.g., D, E, F, H, J, K, L, M, N, P, R, S, T, U, V) to a common bus. The specified diodes for these loads are D-664 (equivalent to IN3606) and the resistors are 3,000 ohms.
  • Clamping/Regulation Section: This section connects to the common bus and provides clamping/regulation via a series of diodes (D16-D23), resistors (R16, R17 - 1,500 ohms), and capacitors (C1, C2, C3 - 0.01 MFD). This section is connected to -15V, -3V, and ground (GND) rails. The diodes in this section are specified as D-662 (equivalent to IN645).

• General Component Specifications: Unless otherwise indicated, resistors are 1/4W with 5% tolerance.

• Administrative Details: The document revision is B, and it was drawn and checked by H. Porter and N. Perryman, and engineered by B. Scudney, with dates in April-May 1964. The document number is W005-0-1.