Function of the card:
Three-Way OR, Type B (out-of- phase load)
Part number: 371342
Used in: IBM 7090
Cap code: YY (details)
+O: Positive OR. In-phase output is positive if one or more input signals are positive. Out-of phase output is negative for the above condition.
IBM Standard Modular System, Component Circuits, p85
SMS Cap Code Templates & Index
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.