File:Marconi Valve Tuner.jpg
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Summary
| Description |
English: The Marconi Valve Tuner, an early unamplified radio receiver manufactured by the Marconi Company for use on ships to receive wireless telegraphy signals. It used the Fleming valve, the first vacuum tube, invented by John Ambrose Fleming as a detector to rectify the radio wave carrier and extract the Morse code "dots" and "dashes", The set had two valves (visible at top); one was a spare in case the other burned out. |
| Date | |
| Source | Retrieved December 30, 2015 from Rupert Stanley (1914) Textbook on Wireless Telegraphy, Longmans Green and Co., New York, p. 252, fig. 144 on Google Books |
| Author | Rupert Stanley |
Licensing
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1931, and if not then due to lack of notice or renewal. See this page for further explanation.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:02, 31 December 2015 | | 529 × 367 (42 KB) | wikimediacommons>Chetvorno | User created page with UploadWizard |
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