File:Navy Poulsen arc transmitter schematic.png

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Navy_Poulsen_arc_transmitter_schematic.png ‎(690 × 497 pixels, file size: 81 KB, MIME type: image/png)

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Description
English: Schematic diagram of a Poulsen arc radio transmitter used by the US Navy The Poulsen arc transmitter, invented in 1903 by Valdemar Poulsen was an early type of continuous wave radio transmitter used in some of the first AM (sound) radio stations until the early 1920s when it was replaced by vacuum tube transmitters.
Date
Source Retrieved May 28, 2015 from Pierre H. Boucheron, "Arc Undampt Transmission" in Radio Amateur News magazine, Experimenter Publishing Co., New York, Vol. 1, No. 4, October 1919, p. 158, fig. 1 on http://www.americanradiohistory.com.
Author Pierre H. Boucheron

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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, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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current05:38, 30 May 2015Thumbnail for version as of 05:38, 30 May 2015690 × 497 (81 KB)Chetvorno (talk | contribs)User created page with UploadWizard

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