File:Nauen umbrella antenna 1907.jpg
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
Size of this preview: 779 × 600 pixels. Other resolutions: 312 × 240 pixels | 623 × 480 pixels | 997 × 768 pixels | 1,280 × 986 pixels | 1,766 × 1,360 pixels.
Original file (1,766 × 1,360 pixels, file size: 346 KB, MIME type: image/jpeg)
File information
Structured data
Captions
Summary
[edit]DescriptionNauen umbrella antenna 1907.jpg |
English: A large umbrella antenna used as the transmitting antenna for the transatlantic wireless telegraphy radio station, Nauen Transmitter Station, built by Gesellshaft fur Drahtlose Telegraphie at Nauen, Germany in 1906, which served as Germany's main communication channel with other nations during World War 1. It consisted of a steel truss tower 100 meters (328 feet) tall, insulated from the ground, attached to the transmitter, with a radial network of cables extending diagonally from the top, anchored to the ground at a distance of 200 m from the tower. The bottom end of the 162 umbrella cables were attached to the three ground anchors with hemp ropes, so the umbrella was insulated from the ground. The surface area of the umbrella was 60,000 square meters (646,000 sq. ft. or about 15 acres). The Nauen spark transmitter had an input power of 35 horsepower (26 kilowatts) and radiated in the very low frequency band. The vertical tower served as an electrically short monopole mast radiator and the radial cables served as a capacitive top load to increase the current in the radiator. The other side of the transmitter was connected to a ground (Earth) system consisting of 108 buried cables radiating from the tower, covering 126,000 square meters or about 31 acres.
Caption: "General view of the wireless station at Nauen. The dotted lines are the eye-bar staying cables. In the photograph the cables forming the antenna have been retouched. In reality they are almost invisible" |
Date | |
Source | Retrieved September 21, 2015 from L. Ramakers, "The new wireless station at Nauen Germany" in Scientific American supplement, Munn and Co., New York, Vol. 63, No. 1621, January 26, 1907, p. 25972, fig. 1 on Google Books |
Author | L. Ramakers |
Licensing
[edit]Public domainPublic domainfalsefalse |
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.
|
||
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.
|
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 00:01, 22 September 2015 | 1,766 × 1,360 (346 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on hu.wikipedia.org
- Usage on it.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
JPEG file comment | Created with GIMP |
---|
Structured data
Items portrayed in this file
depicts
Hidden category: