File:NSRW Telegraphy, Wireless - coherer.png
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NSRW_Telegraphy,_Wireless_-_coherer.png (697 × 205 pixels, file size: 26 KB, MIME type: image/png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:15, 22 February 2018 | 697 × 205 (26 KB) | Bob Burkhardt | {{Information |description ={{en|1=Diagram of a coherer, an electric device used with wireless telegraphy: (''T'') exhausted glass tube; (''PP'') silver terminals separated by metal filings and connected with (''A'') vertical wire and (''E'') ground.}} |source =“Telegraphy, Wireless,” ''The New Student's Reference Work'', v. 4, p. 1882, fig. II. |author ={{unknown}} |date =published 1914 |permission ={{PD-1923}} }} Category:Wireless telegraphy Category:Coherers |
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