File:Antenne 160m om.jpg
Jump to navigation
Jump to search
Size of this preview: 800 × 314 pixels. Other resolutions: 320 × 126 pixels | 1,024 × 402 pixels.
Original file (1,024 × 402 pixels, file size: 126 KB, MIME type: image/jpeg)
Captions
Captions
Add a one-line explanation of what this file represents
Summary
[edit]| Description |
Français : Antenne radioamateur au-dessus d'un immeuble en France, en 1912. Ce type est appelé antenne L inversée , et est largement utilisé dans la bande radio ondes longues (basse fréquence) des 160 mètres (1,5 MHz à 2 MHz), l'antenne était le type le plus utilisé de la télégraphie sans fil au début du 20ème siècle. Il se compose d'un certain nombre de fils horizontaux parallèles comme des cordes à linges, suspendus par des supports isolés à chaque extrémité, avec des fils verticaux reliés à une extrémité (droite) tombant vers l'émetteur. Les fils verticaux sont l'élément rayonnant; tandis que les fils horizontaux servent de charge pour ajouter de la capacité à l'antenne, pour augmenter le courant dans l'élément vertical, et donc la puissance rayonnée.
English: A wire amateur radio antenna suspended above an apartment house in France, in 1912. This type is called an inverted L antenna, and is widely used in the longwave (low frequency) radio band, which was the most widely used band during the wireless telegraphy era at the beginning of the 20th century. It consists of a number of parallel horizontal wires like a clothesline, suspended by insulated supports at each end, with vertical wires connected at one end (right) dropping down to the transmitter. The vertical wires are the radiating element; while the horizontal wires serve as a capacitive top-load, to add capacitance to the antenna, to increase the current in the vertical element, and thus the radiated power. This is a recently colorized version of a historical black and white photo. Since the colors are only a guess by a modern editor at the original colors, this photo should be regarded as WP:ORIGINAL RESEARCH and should not be used in encyclopedia articles. Instead the original black and white version Antenne 160m om original.jpg should be used. |
| Date | |
| Source | Société de TSF française à Juvisy-sur-Orge. Scanné par F1jmm |
| Author | Unknown photographer |
| Other versions | Original black and white version: Antenne 160m om original.jpg |
gallery
[edit]
Licensing
[edit]
|
This image (or other media file) is in the public domain because its copyright has expired and its author is anonymous.
This applies to the European Union and those countries with a copyright term of 70 years after the work was made available to the public and the author never disclosed their identity. Important: Always mention where the image comes from, as far as possible, and make sure the author never claimed authorship.  Note: In Germany and possibly other countries, certain anonymous works published before July 1, 1995 are copyrighted until 70 years after the death of the author. See Übergangsrecht. Please use this template only if the author never claimed authorship or their authorship never became public in any other way. If the work is anonymous or pseudonymous (e.g., published only under a corporate or organization's name), use this template for images published more than 70 years ago.
For a work made available to the public in the United Kingdom, please use Template:PD-UK-unknown instead.
|
|
 |
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: brightness adjusted and colorized. Modifications made by F1jmm.
|
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:35, 13 October 2023 | | 1,024 × 402 (126 KB) | Fellegis (talk | contribs) | denoise, color-balance xxx |
| 08:34, 13 October 2023 |  | 1,880 × 738 (377 KB) | Fellegis (talk | contribs) | Reverted to version as of 09:48, 4 April 2020 (UTC) | |
| 08:25, 13 October 2023 |  | 1,024 × 402 (126 KB) | Fellegis (talk | contribs) | denoise, color-balance | |
| 09:48, 4 April 2020 |  | 1,880 × 738 (377 KB) | F1jmm (talk | contribs) | Colorisation image NB d'origine | |
| 09:44, 4 April 2020 |  | 1,880 × 738 (414 KB) | F1jmm (talk | contribs) | Colorisation | |
| 18:35, 9 July 2012 |  | 1,880 × 738 (430 KB) | F1jmm (talk | contribs) | éclairage image | |
| 08:21, 1 May 2011 |  | 1,880 × 738 (394 KB) | F1jmm (talk | contribs) | {{Information |Description= antenne radioamateur en france |Source={{own}} |Date=1912 |Author= F1jmm |Permission= |other_versions= }} Category:Amateur radio antennas |
You cannot overwrite this file.
File usage on Commons
The following 4 pages use this file:
File usage on other wikis
The following other wikis use this file:
- Usage on fr.wikipedia.org
- Usage on nl.wiktionary.org
- Usage on www.wikidata.org
