Them: Crystal detector - Wikipedia

The contact between two dissimilar materials at the surface of the detector's semiconducting crystal forms a crude semiconductor diode, which acts as a rectifier.

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1 Re: Manual of Wireless Telegraphy for the Use of Naval Electricians

Navy Radio Communications & Technology Publications Manual of wireless telegraphy (radio) for the use of naval electricians - Samuel Shelburne Robison: US Naval Institute: 1913 (3rd ed.) on line version.

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Wireless Receivers - SparkMuseum AWA P1 Wireless Receiver 1919 Click Click here to see the entire AWA spark gap receiver and transmitter: Independent Wireless Telegraph A-1 c. 1915

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Crystal radio - Wikipedia While it never regained the popularity and general use that it enjoyed at its beginnings, the crystal radio circuit is still used. The Boy Scouts have kept the.

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