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

Function of the card:
Alloy – Integrator Positive Input Three P Lines

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

Part number: 371459

Used in: IBM 7090

Cap code: YE (details)

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.

References: Drawing courtesy of Living Computers: Museum + Lab
SMS Cap Code Templates & Index

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.