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

Function of the card:
N and P Block Coupling Networks
Alloy coupling netwrks for n&p blcks

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

Part number:371241

Used in:IBM 1414 I/O Synchronizer,IBM 7070,IBM 7090,IBM 729V

Symbol:R

R: Load. Provides proper terminating impedance or optimum coupling of one circuit to another at the correct operating voltage level.

Family: current mode

References:
IBM Standard Modular System, Component Circuits, p29.
1414 SMS Cards, p54.
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.