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

Function of the card:
Diff base - oscillator, 240 kc s line gated
Diff Base-Oscillator, 240 KC S Line Gated

Listed in 1401 SMS card usage

Part number: 370127

PCB number: 493327

Used in: IBM 1401, IBM 1410

IBM SMS card type DAZ 370127 IBM SMS card type DAZ 370127

References: 2_2 SMS Cards, p69
Coslet data
1410_SMS_VOL_1.pdf, p11
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.