Artifact Details

Title

SMS card

Catalog Number

102730071

Type

Physical object

Date

1959 ca.

Manufacturer

International Business Machines Corporation (IBM)

Identifying Numbers

Other number 111054 Engraved on the conmponent side of the card (engineering part number?)
Other number 3 25 Written in red felt-tip pen on the component side of the card; the '3' is upside-down.
Other number 49317 Written with solder on the circuit side of the card
Other number YBD23H UL Engraved on the conmponent side of the card
Part number 370330 Engraved on the conmponent side of the card

Dimensions

overall: 3/8 in x 4 1/2 in x 2 5/8 in

Description

Two identical cards share this catalog number. The card is a 'DBH' card whose function is unknown. The module consists of two rows of components, jumpers, and three transistors (one of which is mounted on a red anodized aluminum heat sink).

Category

Component/module

Credit

Gift of Paul Pierce

Lot Number

X7021.2014