This page describes the IBM SMS card "WM", and is part of the SMS card database.

Function of the card:
Alloy-Sense Amplifiers, Single Shot
Alloy-sense amplifiers, single shot

Dual Open Collector Sense Amplifier

Germanium alloy transistors were an early type of transistor, faster than the earlier grown-junction transistors.

Part number: 371882

PCB number: 493183

Used in: IBM 1620

Cap code: None (details)

Symbol: AMP

Pinout:

A O1
B
C O2
D
E
F I1
G
H I2
J GND
K
L
M -12V
N
P
Q +12V
R
References: IBM 1620 Instructional System Diagrams, p496
Coslet data

The information on these pages comes from a variety of sources, especially old IBM documents on bitsavers.org, as well as information from the IBM 1401 restoration team, especially Tim Coslet's SMS data and Jim Hunt's data. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.