File:Coherer.jpg
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Coherer.jpg (244 × 166 pixels, file size: 8 KB, MIME type: image/jpeg)
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Summary
DescriptionCoherer.jpg |
English: A coherer, a primitive radio wave detector used in the first radio receivers around the turn of the 20th century. This type was developed by Guglielmo Marconi in the late 1890s. It consists of a tube or capsule containing two electrodes spaced a small distance apart, with metal filings in the space between them. When a radio frequency signal is applied to the device, the initial high resistance of the filings reduces, allowing an electric current to flow through it. |
Date | |
Source | The source is the Wikipedia entry, Coherer, url=http://en.wikipedia.org/wiki/Coherer. |
Author | J. A. Davidson, specifically JA.Davidson. |
Licensing
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http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
Items portrayed in this file
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25 May 2013
image/jpeg
aca7dc879865f19255f4dcfb21a074240aa6dd5a
7,906 byte
166 pixel
244 pixel
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:28, 26 May 2013 | 244 × 166 (8 KB) | Marshallsumter | User created page with UploadWizard |
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