Function of the card:
SDTRL high power non inverting driver
SDTRL high pwr non inverting driver
Part number: 370233
PCB number: 493321 , hole pattern: 491379
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.