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Information about Grimeton Vlf Transmitter

Varberg Radio Station*
UNESCO World Heritage Site
Enlarge picture
VLF transmitter Grimeton
State Party Sweden
TypeCultural
Criteriaii, iv
Reference1134
RegionEurope and North America
Inscription History
Inscription2004  (28th Session)
* Name as inscribed on World Heritage List.
† Region as classified by UNESCO.
The Grimeton VLF transmitter is a VLF transmission facility near Grimeton close to Varberg in Sweden. It was built in 1923 and has the only workable machine transmitter in the world. For its radiating element it uses a wire aerial hung on six 127-metre high freestanding steel towers looking like gigantic pylons. These towers are grounded.

The VLF transmitter Grimeton was used until the fifties for transatlantic radio telegraphy to Radio Central in Long Island, New York, USA. After the fifties it was used until 1996 for transmitting orders to submarines. In 1968 therefore a second transmitter was installed. This transmitter uses transistor and tube technology unlike the machine transmitter, which works on 17.2 kHz, designed for frequencies around 40 kHz, but using the same aerial. In 1996 the machine transmitter became obsolete and went out of service. Because it is in good condition it was declared a national monument. On special occasions such as Alexanderson Day it is used for transmitting Morse messages on 17.2 kHz. Its signal for identification is SAQ (... .- --.- )


The machine transmitter can be visited in the summertime. It is a great attraction especially on Alexanderson Day.

The transmitter from the 1960s is still used by the Swedish Navy. Since it uses the same aerial as the machine transmitter a simultaneous operation of both transmitters, which would require expensive frequency filters, is not possible. So these special transmissions are very rare. The Grimeton VLF transmitter is not only used for VLF transmission. It is also used for shortwave transmissions and for FM and TV broadcasting. Therefore a 260 metre high guyed steel framework mast was built in 1966 next to the building containing the transmitter for 40 kHz.

On July 2, 2004 the Grimeton VLF transmitter was declared a World Cultural Heritage site by UNESCO.

The twin station Nadawcza Radiostacja Transatlantycka Babice in Babice, Poland was destroyed in 1945.

See also

External links

 •  • [ e]
World Heritage Sites in Sweden
Agricultural Landscape of Stora Alvaret (Southern land) Birka and Hovgrden Church Village of Gammelstad, Lule Engelsberg Ironworks High Coast / Kvarken Archipelago (with ) Naval Port of Karlskrona Laponian Area Mining Area of the Great Copper Mountain, Falun Rock Carvings in Tanum Royal Domain of Drottningholm Skogskyrkogrden Struve Geodetic Arc (with nine other countries) Varberg Radio Station (Grimeton VLF transmitter) Hanseatic Town of Visby


Coordinates:
A UNESCO World Heritage Site is a specific site (such as a forest, mountain, lake, desert, monument, building, complex, or city) that has been nominated and confirmed for inclusion on the list maintained by the international World Heritage Programme administered by the UNESCO
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State Party Natural WHS Cultural WHS Mixed WHS Total WHS Zone
 Afghanistan 2 2 Asia-Pacific
 Albania 2 2 Europe & North America
 Algeria 6 1 7 Arab States
 Andorra 1 1 Europe & North America
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Motto
(Royal) "För Sverige - I tiden" 1
"For Sweden – With the Times" ²
Anthem
Du gamla, Du fria
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Very low frequency or VLF refers to radio frequencies (RF) in the range of 3 kHz to 30 kHz. Since there is not much bandwidth in this band of the radio spectrum, only the very simplest signals are used, such as for radio navigation.
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County Halland County
Province Halland and Västergötland
Seat Varberg

Area
 • Total area
 • Land area 127th of 290
913.86 km
874.
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Motto
(Royal) "För Sverige - I tiden" 1
"For Sweden – With the Times" ²
Anthem
Du gamla, Du fria
..... Click the link for more information.
19th century - 20th century - 21st century
1890s  1900s  1910s  - 1920s -  1930s  1940s  1950s
1920 1921 1922 - 1923 - 1924 1925 1926

Year 1923 (MCMXXIII
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Alexanderson alternator is a rotating machine invented by Ernst Alexanderson for the generation of high frequency alternating current up to 100 kHz, for the purpose of radio communication. It is on the list of IEEE Milestones as a key achievement in electrical engineering.
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Long Island is an island in southeast New York, USA. It has an area of 3,567 square miles (10,377 km²) and a population of 7,448,618 as of the 2000 census, with the population estimated at 7,559,372 as of July 1, 2006, making it the largest island in the 48 contiguous U.S.
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submarine is a watercraft that can operate underwater. Military submarines were first widely used in World War I and are used by all major navies today. Civilian submarines and submersibles are used for scientific work at depths too great for human divers.
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The Alexanderson Day, named after the inventor Ernst Fredrik Werner Alexanderson, is the day of the open house (first sunday of july each year) at the VLF transmitter Grimeton.
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Royal Swedish Navy (Swedish: Marinen) is the naval branch of the Swedish Armed Forces. It consists of surface and submarine naval units – the Fleet (Flottan) – as well as marine units, the so-called Amphibious Corps (
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FM can refer to:

In science and engineering

  • Frequency modulation, the carrying of information over an electromagnetic wave by varying its frequency. Its most common applications are:

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19th century - 20th century - 21st century
1930s  1940s  1950s  - 1960s -  1970s  1980s  1990s
1963 1964 1965 - 1966 - 1967 1968 1969

Year 1966 (MCMLXVI
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July 2 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

It is the middle day of a non-leap year, because there are 182 days before and 182 days after.
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20th century - 21st century - 22nd century
1970s  1980s  1990s  - 2000s -  2010s  2020s  2030s
2001 2002 2003 - 2004 - 2005 2006 2007

2004 by topic:
News by month
Jan - Feb - Mar - Apr - May - Jun
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A UNESCO World Heritage Site is a specific site (such as a forest, mountain, lake, desert, monument, building, complex, or city) that has been nominated and confirmed for inclusion on the list maintained by the international World Heritage Programme administered by the UNESCO
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United Nations Educational, Scientific and Cultural Organization

UNESCO flag
Org type: Specialized Agency
Acronyms: UNESCO
Head: Director General of UNESCO
Koïchiro Matsuura
 Japan
Status: Active

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Boernerowo is a neighbourhood in the Warsaw's borough of Bemowo. Initially the spot was occupied by a small village called Babice, with an eponymous fort located in its centre.
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Motto
none1
Anthem
Mazurek Dąbrowskiego   (Polish)
Dąbrowski's Mazurek
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19th century - 20th century - 21st century
1910s  1920s  1930s  - 1940s -  1950s  1960s  1970s
1940 1941 1942 - 1943 - 1944 1945 1946

Year 1945 (MCMXLV
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list of masts 300 meters or higher.

Terminology

There is often ambiguity between the terms tower and mast. A tower is a self-supporting or cantilevered structure, while a mast is held up by stays or guys. (See List of towers).
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Main article: Tower
The following fall under the definition of a tower which is a tall man-made structure, always taller than it is wide, and usually much higher.
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Structurae is an online database containing works of structural and civil engineering of all kinds such as bridges, high-rise buildings, towers, dams, etc. Additionally, the database contains information on companies and persons (engineers, architects, and builders) involved in the
..... Click the link for more information.
Structurae is an online database containing works of structural and civil engineering of all kinds such as bridges, high-rise buildings, towers, dams, etc. Additionally, the database contains information on companies and persons (engineers, architects, and builders) involved in the
..... Click the link for more information.
A UNESCO World Heritage Site is a specific site (such as a forest, mountain, lake, desert, monument, building, complex, or city) that has been nominated and confirmed for inclusion on the list maintained by the international World Heritage Programme administered by the UNESCO
..... Click the link for more information.
Motto
(Royal) "För Sverige - I tiden" 1
"For Sweden – With the Times" ²
Anthem
Du gamla, Du fria
..... Click the link for more information.
State Party  Sweden
Type Cultural
Criteria iv, v
Reference 968
Region Europe and North America

Inscription History
Inscription 2000  (24th Session)
..... Click the link for more information.
State Party  Sweden
Type Cultural
Criteria iii, iv
Reference 555
Region Europe and North America

Inscription History
Inscription 1993  (17th Session)
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