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Diagram of simple spark gap transmitter and receiver.

Diagram of simple spark gap transmitter and receiver.

Spark Gap Transmitter Schematic

Spark Gap Transmitter Schematic

BEACON-ラジオを自作しよう(3)

BEACON-ラジオを自作しよう(3)

low power spark gap transmitter typical of the period.

low power spark gap transmitter typical of the period.

CRL NEWS 1993.3 No.204

CRL NEWS 1993.3 No.204

Cohere.jpg

Cohere.jpg

As early as 1892, Nikola Tesla created a basic design for radio. On November 8, 1898 he patented a radio controlled robot-boat.  Tesla used this boat which was controlled by radio waves  in the Electrical Exhibition in 1898, Madison Square Garden.

As early as 1892, Nikola Tesla created a basic design for radio. On November 8, 1898 he patented a radio controlled robot-boat. Tesla used this boat which was controlled by radio waves in the Electrical Exhibition in 1898, Madison Square Garden.

コヒーラの実験

コヒーラの実験

KW synchronous rotary spark gap transmitter

KW synchronous rotary spark gap transmitter

コヒーラ(ブランリー管・ラジオコンダクタ)

コヒーラ(ブランリー管・ラジオコンダクタ)

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