Artifact Details

Title

IBM 700 series vacumn tube module

Catalog Number

102729937

Type

Physical object

Date

1955 ca.

Identifying Numbers

Model number 518827 Stamped in black ink on the metal tube carrier.
Other number 2099 Stamped in black ink on the metal tube carrier.

Dimensions

overall: 1 1/8 in x 9 5/8 in x 7 3/4 in

Description

This module consists of a Bakelite plug with two rows and eight columns of contact pins, four rows of solder terminals on each side, and eight tube sockets on top. There is a rod that extends from above the tubes to a cam on the bottom to lock the module in place. Components are mounted vertically between adjacent solder terminals. Seven sockets are wired and populated. A hand written note (on the back of a punch card) is taped to the module. The note reads:
"CORE DATA REG
FAILED AS 12 & 13 BIT
THINK BOTH SIDES F/F COME ON AS IT CAN PICK BIT BUT NOT STORE IN CORE
SOMETIMES ALL TUBES TEST OK.
BUT HAVE NOT BEEN EXCHANGED
CSF7 A ROW"

Category

Component/vacuum tube

Credit

Gift of Paul Pierce

Lot Number

X7021.2014