Artifact Details


Whirlwind vacuum tube module R&RD

Catalog Number



Physical object



Identifying Numbers

Serial number 1 Stamped in white ink between the vacuum tube and relay sockets.


overall: 5 1/4 in x 1 5/8 in x 9 1/2 in


This plug-in module is formed by an open chassis on three sides and a Bakelite plug with 24 flat contacts on the fourth side. A handle is attached on the end of the chassis opposite the connector. A flange on each side holds a captive screw used for securing the module into one of the positions of the ten-module rack.

One 9-pin miniature vacuum tube socket and an 8-pin octal socket, into which a SPDT enclosed relay is inserted, are mounted on the same end as the handle. Two phenolic solder terminal strips span the space between the two sides of the chassis to which passive components are soldered. Point-to-point wiring connects the connector, the tube socket pins,and the solder terminal strips.

The tube complement is one 5965, which is missing.

There is an index card that says "NR3138 - Box 4 - #12 R&RD" written in red ball point pen Scotch-taped to one of the open sides of the module.



Lot Number