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

Function of the card:
6 Volt Diff Amplifier
6 Volt. Diff. Amplifier
Power supply
6 volt diff. amplifier

Replacement for QU.
Listed in 1401 SMS card usage

Part number: 370612

Used in: IBM 1410, IBM 1414 I/O Synchronizer, IBM 1401, 7040

Cap code: None (details)

References: 1410_SMS_VOL_2.pdf, p27
1_2 SMS Cards, pp21,22
Coslet data

The information on these pages comes from a variety of sources, especially old IBM documents on bitsavers.org, 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.