Function of the card:
SDTDL memory .280 usec delay line
Part number: 370245
Customer Eng reference number: 734349
PCB number: 493389 , hole pattern: 492672
IBM 1311 ILD, p119
IBM 2821 CCD, p46
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.