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

Function of the card:
General Purpose Filter Card
General purpose filter card

Listed in 1401 SMS card usage
Penta Capacitor 10uf 20VDC

Part number: 371501

PCB number: 491477

Used in: IBM 1401, IBM 1311 Disk, IBM 1410, IBM 7070

Symbol:FILT

FILT: Filter. Capacitor card used to filter voltage supplies.
IBM SMS card type GJ 371501 IBM SMS card type GJ 371501 IBM SMS card type GJ 371501 IBM SMS card type GJ 371501

Image courtesy of Randall Neff

Pinout:

A
B
C
D
E
F
G
H
J GND
K -C1
L +C2
M -C3
N
P
Q +C4
R -C5
References: Coslet data
IBM 1311 ILD, p131
1410_SMS_VOL_2.pdf, p84
2_2 SMS Cards, p18
IBM Standard Modular System, Component Circuits, p123

This page created by Ken Shirriff on Wed Sep 15 18:15:10 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.