Radio Set - The Secret Life of Machines - Video/DVD

Radio Set - 25 minutes Hunkin's first demo in this program shows a huge aerial driving a radio with no batteries. Animation and demo shows how sparks and lightning make a radio crackle - receive. Hertz experiment, sparks make energy in air, cause spark nearby. Animation explains how Marconi experimented with aerial strung from kite. Demo using car ignition spark (see pic). Sparks give huge bandwidth - tuned circuit more focussed. Inductor - capacitor circuit explained. Oscilliscope picture of spark and wave. Morse code was easy in the early days - but not speech. Hunkin shows a radio controlled model demo. Oscilliscope demo of amplitude varied radio waves - demo - sound and voice. Animation of inventor. Inductors, valves, capacitors. Cat's whisker - diode. Evolution of radio set design. FM - Frequency Modulation - less affected by sparks. Patent contest leads to suicide of early inventor! Special notes

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	The Secret Life of Machines has been on TV around the world - USA, Australia, UK, Britain.... These award winning television programmes show how machines work. Using analogies, illustrations, working models and extraordinary experiments, Tim Hunkin 'lifts the bonnet' on the machines we take for granted. His enthusiasm for his subject is infectious. Excellent education and technology resources.
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