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Summary: Training film focusing on the principles of operation of diode and triode valves and possible use in radio transmitters/receivers.
Description: Reel one: “Until recent years, few people thought of electricity apart from it's association with conductor or insulator materials. A new branch of electrical engineering was born, when physicists showed how electricity could be liberated from a metal and when free, could be controlled with extraordinary ease and in the most complex modes. This emission of electricity and the control of the energy is made possible in the Thermionic Valve.” Description of the construction and workings of valves using diagrammatic animations.
Reel two: principles of the functioning of filaments, anodes and cathodes in vacuum tubes/valves and flow of electrons (Diodes).
Reel three: Description of the “grid” (controller) and it's purpose. Triode valve operation described in animated diagram form.
Reel four: Further description on the operation of a triode valve.
Production Country: GB
Production Details: ROYAL AIR FORCE (Production sponsor)
British Thomson-Houston (Production company)