The RKS Liblice 2 are two 355 m (1,165 ft) tall guyed

Guy-wire

A guy-wire or guy-rope, also known as simply a guy, is a tensioned cable designed to add stability to structures . One end of the cable is attached to the structure, and the other is anchored to the ground at a distance from the structure's base...

 masts located east of Prague

Prague

Prague is the capital and largest city of the Czech Republic. Situated in the north-west of the country on the Vltava river, the city is home to about 1.3 million people, while its metropolitan area is estimated to have a population of over 2.3 million...

 near Liblice

Liblice, Ceský Brod

Liblice is a village in Central Bohemian Region of the Czech Republic, located 33 km east of Prague. It is an administrative part of Český Brod and has a population of 698 .Liblice is known for its broadcasting facility:* RKS Liblice 1-transmitter...

, in close proximity of the RKS Liblice 1

RKS Liblice 1

RKS Liblice 1 is a facility for commercial longwave transmission located in the Czech Republic about east of Prague near Liblice. It uses as a T-antenna hung up on two tall insulated towers built of lattice steel...

. These lattice steel towers are built 120 m (393.7 ft) apart from each other, at which cage aerials are mounted. Designed by Jan Šťovíček, these supertall towers currently stand as the tallest towers in the world used for broadcasting in the mediumwave range. RKS Liblice-2 was built in 1976, and is currently used for broadcasting on 639 kHz. During construction, two new transmitter devices of the type Tesla SRV 750 with an output power of 750 KW were installed. In regular operation these transmitters are switched in parallel for a transmission power of 1500 KW.

History

The RKS Liblice 2 was once two 280.4 m (919.9 ft) tall towers before it was demolished for the construction of the current towers on October 17, 1972. Built in 1936 by Karlova Huť, these towers survived World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 without damages.

Incidents

• On November 23, 1978, the transmission frequency of the new towers, which was 638 kHz since 1950, was changed to 639 kHz in order to fulfill the regulations of waveplan of Geneva
  Geneva
  Geneva In the national languages of Switzerland the city is known as Genf , Ginevra and Genevra is the second-most-populous city in Switzerland and is the most populous city of Romandie, the French-speaking part of Switzerland...
  
  .

• On August 27, 2005, a skydiver had jumped off one of the masts after gaining illegal access to it. His parachute was accidentally hooked to a backstage insulator. Fortunately, the incident did not get him too close to the cage antenna of the tower, which may would otherwise lead to his death due to the presence of high frequency currents.

See also

• List of masts
• List of tallest structures in Czech
• List of twin buildings and structures

External links

• Technical data (Czech)
• Photogallery
• Schema of first tower
• Schema of second tower
• http://www.prostor-ad.cz/pruvodce/pvychod/cbrod/vysilac.htm