File:Coherer.jpg
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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. |
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:28, 26 May 2013 | | 244 × 166 (8 KB) | Marshallsumter (talk | contribs) | User created page with UploadWizard |
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