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

Function of the card:
Alloy clutch magnet dr.
Clutch magnet driver

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

Part number: 372245

Customer Eng reference number: 734342

PCB number: 484997 , hole pattern: 491329

Used in: IBM 1443 Printer, IBM 2821 Control Unit

IBM SMS card type ASQ 372245 IBM SMS card type ASQ 372245

References: IBM 1443 ALD, p79
IBM 2821 CCD, p22
This page created by Ken Shirriff on Wed Sep 15 18:15:11 2021.

The information on these pages comes from a variety of sources, especially old IBM documents on, 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.