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

Function of the card:
720kc oscillator and shaper

Part number: 372682

Customer Eng reference number: 734384

Used in: IBM 2821 Control Unit

References: IBM 2821 CCD, p120
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 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.