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

Function of the card:
Sense Amplifier-Clipping Level Control
Sense amplifier-clipping level control

Listed in 1401 SMS card usage

Part number: 370419

PCB number: 484153

Used in: IBM 1401, IBM 1410

IBM SMS card type YCA 370419 IBM SMS card type YCA 370419

References: 1_2 SMS Cards, pp5,6,7,8
Coslet data
1410_SMS_VOL_1.pdf, p117
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.