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Diagram of simple spark gap transmitter and receiver.

Guglielmo Marconi’s first wireless tuned transmitter, completed in Poole in 1899

コヒーラの実験

Make a Battery From Salt and Water Not a lot of people know this, but you can actually power devices from little more than salt, water, steel and copper. Learning how to harness your own energy can...

1930s Old Radio

コヒーラ(ブランリー管・ラジオコンダクタ)

Art Déco - Radio 'Boite à Bijoux' - Bakélite Catalin - Ecaille de Tortue - General Electric L622 - Début des Années 40

BEACON-ラジオを自作しよう(3)

Magnetic Wormhole Created in Lab 8/21/15 Device acts like a wormhole, as if the magnetic field was transferred through an “extra special dimension” - Scientific American

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