[youtube_sc url=”https://www.youtube.com/watch?v=hwutHPYGgfU&feature=player_embedded#!” title=”Audio%20transfer%20and%20restoration” ratio=”4:3″ modestbranding=”1″ start=”4″]

This is an odd educational film, possibly intended for the school audio-visual market. Like any film meant to be shown in Electronic Shop I, it isn’t very flashy but it has a lot of infomation to offer.

It starts off with a rather crude Valve Parade, which is well lit and becomes almost an eerily prescient Valve Dance at times.

It moves right into a dry but effective explanation of how vacuum tubes work and why anyone ever wanted to bother with them at all. The theory is incredibly basic, but it’s well presented. Today’s students raised on iPods and smart phones would undoubtedly learn a thing or two, if they didn’t tune out of the typical 1940s plodding pace and fall asleep first. The application scenes are a hoot, with all kinds of scary 1940s industrial equipment doing scary 1940s industrial things like RF heating, controlling steel mills, speeding up production of some kind of plated metal stuff, exposing chest x-ray patients to huge levels of ionizing radiation, and throwing out UV rays against which some unfortunate paramecia (shown in micrograph) never stand a chance.

Since it’s 1943, we don’t have to wait long before the military applications climax the show, with typically heroic newsreel footage of British coastal defenses giving Hitler’s Luftwaffe a nasty reception indeed. We are assured that, as soon as Mister Valve has helped win the war, the consumer can expect all manner of wonderful new miracles of technology. We segue into another Valve Parade, as up comes the same typically stirring WWII canned march music that began the film. Triumphantly, we then decisively fade out over the Westinghouse logo. Civilization marches on.

Enjoy the film