Function of the card:
Alloy-Universal Delay Circuit
One Shot, programmable & adjustable (basic 7-36uS)
Listed in 1401 SMS card usage
Germanium alloy transistors were an early type of transistor, faster than the earlier grown-junction transistors.
Part number: 371884
PCB number: 492741
Used in: IBM 1401
Cap code: None (details)
Symbol: DLY
DLY: Delay. Delays a pulse for a certain specified constant time.
Image courtesy of Christoph Methfessel
Pinout:
 |
A CAP (6mS-30mS) B I1 C CAP (60uS-340uS) D E F CAP (300uS-1.7mS) G IE H J GND K -6V L +6V M -12V N O1 P I1 Q +6VM R -12VM |
Coslet data
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.