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

Function of the card:
Alloy-One Way “N” Block
N to P Converter (no loads)
Alloy one way n block
Alloy-field replacement,am card
Listed in 1401 doc, but not present in CHM 1401 (details)

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

Part number:371203

Field replacement part number:370904

Customer Eng reference number:729808

Used in:IBM 1401,IBM 7070,IBM 7090

Symbol:C

C: Converter. Used to translate from one voltage level to another, or to change the amplitude of the voltage swing about the same reference level.

Family: current mode

References:
1_2 SMS Cards, p28,65.
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.