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

Function of the card:
Pre-amp not mod i

Level Converters/Drivers (2 different types)

Part number: 372613

PCB number: 747259

Used in: IBM 1311 Disk


A O1E2
B O1E1
C O1C2
D O2
E O2
F I2
G O2
H O2
L I1
M -12V
N +12VM
P I2
R O1C1
References: IBM 1311 ILD, p143
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.