Function of the card:
CTDL-One Way PNP 2 Loads Four on Card
T to 11 Converter (2 loads)
Ctdl on way pnp 2 loads
Complemented Transistor Diode Logic (CTDL) is IBM's term for a form of diode-transistor logic.
Part number:371272
Field replacement part number:370981
Customer Eng reference number:729847
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
IBM Standard Modular System, Component Circuits, p54.
1_2 SMS Cards, p37,109.
1414 SMS Cards, p99.
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 23:40:33 2015.