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

Function of the card:
Alloy-Universal Delay Circuit

One Shot, programmable & adjustable (basic 7-36uS)

Germanium alloy transistors were an early type of transistor, faster than the earlier grown-junction transistors.

Part number:371884

Field replacement part number:371884

Customer Eng reference number:729800

Used in:IBM 1401

Symbol:DLY

DLY: Delay. Delays a pulse for a certain specified constant time.

Transistor type:033 083

References:
1_2 SMS Cards, p48.

Pinout:

A CAP (6mS-30mS)
B I1
C CAP (60uS-340uS)
D
E
F CAP (300uS-1.7mS)
G IE
H
J GND
K -6V
L +6V
M -12V
N O1
P I1
Q +6VM
R -12VM

This page created by Ken Shirriff, 2015.

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. Images courtesy of Randall Neff. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.

Creation time: Tue Mar 03 23:40:32 2015.