File:1913 Marconi operator room for 5 kilowatt ocean liner station-colorized.jpg
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1913_Marconi_operator_room_for_5_kilowatt_ocean_liner_station-colorized.jpg (677 × 495 pixels, file size: 74 KB, MIME type: image/jpeg)
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English: Photograph of "The Operator's Room on a liner, showing the Receiving Apparatus for a 5-kw. Station", which appeared between pages 252 and 253 in the 1913 edition of "The Year Book of Wireless Telegraphy and Telephony". (Appears to be the Olympic) Français : Photographie de "la salle de l'opérateur sur le paquebot Olympique, montrant l'appareil de réception et d’émission d'une station de 5 kW en télégraphie sans fil", qui est apparue entre les pages 252 et 253 dans l'édition de 1913 de "l'Annuaire de la télégraphie et de la téléphonie sans fil". Station radiotélégraphique avec le détecteur magnétique fixé au mur en dessous de la fenêtre-parloir. Monsieur Brent radiotélégraphiste Marconi. (Avec un dès premier amplificateur audio (BF) à lampe électronique pour le casque). Les navires émettaient sur la longueur d'onde de 300 mètres (1000 kHz) et écoutaient sur la longueur d'onde 600 mètres 500 kHz. Les stations côtières normalement émettaient sur la longueur d'onde 600 mètres (500 kHz) et écoutaient sur la longueur d'onde de 300 mètres (1000 kHz). Les navires et les stations côtières avaient les possibilités d’émettre et de recevoir sur la même longueur d’onde; exemples un navire contactant un autre navire sur la longueur d'onde 600 mètres. |
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| Source | Photograph which appeared between pages 252 and 253 in the 1913 edition of "The Year Book of Wireless Telegraphy and Telephony". |
| Author | Work for hire + colorisation F1jmm |
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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.
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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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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Gestionnaire d'images lumineuses.
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Gallery
[edit]English: Magnetic detector
Français : Détecteur magnétique
.jpg)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:49, 4 October 2020 | | 677 × 495 (74 KB) | F1jmm (talk | contribs) | Uploaded own work with UploadWizard |
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