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

Function of the card:
Alloy-Storage Address Register
Card asm tstr aly stor address reg

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

Part number: 373000

Field replacement part number: 373000

Customer Eng reference number: 729801

PCB number: 490000,490051 , hole pattern: 490000,490051

Used in: IBM 1401

Transistor type:033 034 083

IBM SMS card type ADB 373000 IBM SMS card type ADB 373000

Pinout:

A
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
R

S
T
U
V
W
X
Y
Z
1 GND
2 -6V
3 +6V
4 -12V
5 +30V
6
7 +6VM
8 -12VM
References:
1_2 SMS Cards, p49,50,51,52,53,54,55,56.

This page created by Ken Shirriff.

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.