File:Grimetonmasterna.jpg
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Grimetonmasterna.jpg (230 × 558 pixels, file size: 49 KB, MIME type: image/jpeg)
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[edit]DescriptionGrimetonmasterna.jpg |
English: Antenna towers for the long wave (VLF) radio transmitter site at Grimeton, Sweden. The Grimeton station, built 1922-1924, has the only working Alexanderson alternator rotating armature radio transmitter, and has been made a World Heritage site. It transmits at 17.2 kHz (wavelength 17.4 kilometers) with callsign SAQ. The flattop antenna consists of eight vertical feeder wires from the transmitter which feed energy to eight horizontal 1900 meter (1.2 mile) parallel topload wires, supported on 46 m crossarms on six 127 m towers, shown here. The vertical wires are the radiating elements, while the horizontal wires serve as a capacitor plate which increases the current in the vertical wires, increasing the output power. There is a buried network of ground wires under the antenna which serves as the other plate of the "capacitor". Information from Radiostation Grimeton, The Alexanderson Society
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Source | sv:Bild:Grimetonmasterna.JPG | ||
Author | sv:Användare:Gunnar Larsson |
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[edit]Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:26, 16 January 2011 | 230 × 558 (49 KB) | MichaelFrey (talk | contribs) | JPG Illuminator | |
03:14, 26 December 2004 | 230 × 558 (18 KB) | Chris 73 (talk | contribs) |
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Date and time of data generation | 20:21, 16 January 2011 |
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Software used | jpg-Illuminator |
File change date and time | 20:21, 16 January 2011 |