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

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

Voltage Regulator

Part number: 370610

PCB number: 484335

Used in: IBM 1620, IBM 1410, 7040, 1622

Symbol:AM

AM: Amplifier. Provides increased strength to a detected signal or pulse.
IBM SMS card type YGJ 370610 IBM SMS card type YGJ 370610

Image courtesy of The DHTS Store

Pinout:

A D1
B D2
C E
D C
E V
F DCOMMON
G
H IN
J
K ?
L POS
M R
N
P
Q NEG
R
References: 1410_SMS_VOL_2.pdf, p26
Coslet data
IBM 1620 FE Catalog

This page created by Ken Shirriff on Wed Sep 15 18:15:09 2021.

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.