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

Function of the card:
Drift - Delay Line .1 to .5 uSec 100 ohm
7106 Core Storage
Drive Delay Line .1 to .5 mSec 100 Ohm

Part number: 371621

Used in: 7030, 7040


DLY: Delay. Delays a pulse for a certain specified constant time.

References: National Museum of Computing.

This page created by Ken Shirriff on Wed Sep 15 18:15:09 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.