Function of the card:
CTDL-High Speed One Way NPN Two Loads
U to T Converter (2 loads)
Ctdl hi speed 1 way two loads
Complemented Transistor Diode Logic (CTDL) is IBM's term for a form of diode-transistor logic.
Part number:371588
Field replacement part number:370985
Customer Eng reference number:729871
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: CTDL high speed
IBM Standard Modular System, Component Circuits, p160.
1_2 SMS Cards, p41.
2_2 SMS Cards, p33.
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 23:40:34 2015.