Vacuum Tubes: Electron Theory & the Diode Tube

Creator: Army Signal Corps.

Complete Record: Endless shots of hands holding vacuum tubes, small to large, squadrons of military planes, animated diagrams, conductivity, vacuum tube filament, cathode, electron floating around, military radio w/ vacuum tubes in back, diagram - vacuum tube hooked up to batteries, current flows, graph w/ line sloping upward, army “radio installation, pan up - radio antenna.