This module consists of vacuum tubes, resistors and capacitors. There are 8 vacuum tube sockets of which 7 are populated with tubes marked IBM.
The object is an IBM 700 series vacuum tube module. These modules were used in 701, 702, 704, 705, and 709 computers. The module consists of a steel front plate with 6 miniature tube sockets. There is a plastic connector located about 5 inches behind the front plate. A plastic frame between the front plate and the connector supports 4 tiers of terminal strips. A variety of discrete components are soldered between the terminals on the strips. The connector has a locking cam on a shaft which protrudes through the front plate.
Date
1955 ca.
Manufacturer
International Business Machines Corporation (IBM)
Identifying Numbers
Other number
0174E
Stamped in black on top of metal plate holding vacuum tubes
Other number
330566
Stamped in black on top of metal plate holding vacuum tubes
Other number
A-9
Scratched on top of metal plate holding vacuum tubes
