Title
IBM 700 series vacumn tube moduleCatalog Number
102729937Type
Physical objectDescription
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"
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 inCategory
Component/vacuum tubeCredit
Gift of Paul PierceLot Number
X7021.2014
