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

Function of the card:
Bias load
Bias Load

Part number: 372222

Customer Eng reference number: 734394

Used in: IBM 1443 Printer, IBM 2821 Control Unit

IBM SMS card type YKT 372222 IBM SMS card type YKT 372222

References: IBM 2821 CCD, p96
IBM 1443 ALD, p120
National Museum of Computing.
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.