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

Function of the card:
Voltage Regulatro No. 3
Voltage regulator #3

Part number: 372226

Customer Eng reference number: 734398

Used in: IBM 1443 Printer, IBM 2821 Control Unit

Cap code: None (details)

References: National Museum of Computing.
IBM 2821 CCD, p100
IBM 1443 ALD, p124

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.