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Grimetonmasterna.jpg (230 × 558 pixels, file size: 49 KB, MIME type: image/jpeg)

Summary

Description
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
This is a picture of a Working Life Museums in Sweden, number
1549
in the ArbetSam database.
Source sv:Bild:Grimetonmasterna.JPG
Author sv:Användare:Gunnar Larsson

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Captions

Antenna of Grimeton transmitter station, Sweden

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Date/TimeThumbnailDimensionsUserComment
current19:26, 16 January 2011Thumbnail for version as of 19:26, 16 January 2011230 × 558 (49 KB)MichaelFreyJPG Illuminator
03:14, 26 December 2004Thumbnail for version as of 03:14, 26 December 2004230 × 558 (18 KB)Chris 73

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