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Vintage Vacuum Tube Video

Here is an excellent vintage film about vacuum tubes called “Electronics At
Work” courtesy of the Prelinger collection at the Internet Archive.   While not
specific to just audio tubes,   this WWII era film gives an excellent visual
representation of how tubes work and their innumerable uses.  Among other things
the film illustrates how vacuum tubes can be used to amplify as well as
rectify.   Of particular interest is the use of tubes for radar during WWII.
You already knew that vacuum tubes were capable of producing shimmering cleans
and overdriven crunch,  but did you know they also helped win the war?  So next time
you pop open your Marshall to put in a new batch of 12ax7’s you should have a better
understanding and whole new respect for our friend the vacuum tube!

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