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

Function of the card:
Sense amplifier - input filter and select gate
Sense Amplifier-Input Filter and Select Gate

Listed in 1401 SMS card usage

Part number: 370417

PCB number: 484143

Used in: IBM 1401, IBM 1410

IBM SMS card type YBY 370417 IBM SMS card type YBY 370417

References: 2_2 SMS Cards, p137
1410_SMS_VOL_1.pdf, p116
Coslet data
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.