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

Function of the card:
Oscillator: 500KC

Part number: 374602

PCB number: 396077

Cap code: None (details)

IBM SMS card type EHK 374602 IBM SMS card type EHK 374602

Image courtesy of Arthur Dauzat

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.