ARLA/CLUSTER: Nem só da grandes, medias e pequenas valvulas termoionicas se fez a historia desta tecnologia

[João Costa > CT1FBF]

The Subminiature Vacuum Tube: The Cycle of Technology

A short documentary of the history of the subminiature vacuum tube.
This 16 minute film was produced by the MIT Museum with funding from
Raytheon in 1986 for the MIT Industrial Liaison Program. The producer
and director was Seichi Tsutsumi of the MIT Industrial Liaison
Program.

The film may be freely used provided credit to the MIT Museum is supplied.
http://www.southgatearc.org/news/2015/march/the_subminiature_vacuum_tube.htm#.VQmvD9KsVMA

Our thanks to Stephen G7VFY for spotting this item