TitleIBM 700 series vacumn tube module
|Model number||518827||Stamped in black ink on the metal tube carrier.|
|Other number||2099||Stamped in black ink on the metal tube carrier.|
Dimensionsoverall: 1 1/8 in x 9 5/8 in x 7 3/4 in
DescriptionThis 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"