The RKS Liblice 2 are two tall guyed masts located east of

Prague Prague ( ; ) is the capital and List of cities and towns in the Czech Republic, largest city of the Czech Republic and the historical capital of Bohemia. Prague, located on the Vltava River, has a population of about 1.4 million, while its P ...

near

Liblice Liblice is a municipality and village in Mělník District in the Central Bohemian Region of the Czech Republic. It has about 500 inhabitants. Etymology The village was originally called Ľubice. The name was derived from the personal name Ľuba, ...

, in close proximity of the

RKS Liblice 1 RKS Liblice 1 was a facility for commercial long wave radio transmission located in the Czech Republic about east of Prague near Liblice. It used a T-antenna hung on two tall insulated towers built of lattice steel. The towers were demolished by ...

. These lattice steel towers are built apart from each other, what formed a slightly directional radiation pattern directed towards Spanish Madrid transmitter on the same frequency. The masts carry a special anti-fading cage aerials. Designed by Jan Šťovíček, these

supertall According to the CTBUH, a supertall building is defined as a building between in height. The city with the most supertall buildings is Dubai at 33 entries, followed by Shenzhen and New York City with 21 and 19 supertall buildings respectively. ...

towers currently stand as the tallest towers in the world used for broadcasting in the medium-wave range. RKS Liblice-2 was built in 1976, and is used for broadcasting on 639 kHz, with a period of inactivity from January 2022 to September 2023. During construction, two new transmitter devices of the type ''Tesla SRV 750'' with an output power of 750 kW were installed. At first, these transmitters were switched in parallel for a transmission power of 1500 kW, after 1990 only 750 kW was used for broadcasting. Since 2023, the transmitter broadcasts with only 20 kW of power, a significant lowering. The old transmitter device was replaced with a semiconductor type ''TRAM'' one.

History

The Blaw-Knox RKS Liblice was tall tower before it was demolished on August 11, 2004, in lieu of the construction of the current towers. The original tower were built in 1936, by Karlova Huť; these towers survived

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

without damages.

Events

* On November 23, 1978, the transmission frequency of the new towers, which was 638

kHz The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), often described as being equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose formal expression in terms of SI base uni ...

since 1950, was changed to 639 kHz in order to fulfill the regulations of "waveplan" of

Geneva Geneva ( , ; ) ; ; . is the List of cities in Switzerland, second-most populous city in Switzerland and the most populous in French-speaking Romandy. Situated in the southwest of the country, where the Rhône exits Lake Geneva, it is the ca ...

. * On August 27, 2005, a skydiver jumped off one of the masts after gaining illegal access to it while the transmitter was shut down for repairs. His parachute became accidentally hooked to a backstage insulator and he needed to be rescued by helicopter. * The broadcasts of Czech Radio Prog. 2 ceased at midnight of New Year's Day 2022. * Since September 27, 2023, Country Radio, a private station, broadcasts through this transmitter, replacing the old ''RKS Zbraslav'' one, therefore moving from 1062 to 639 kHz. However, it operates at a greatly reduced power of only 20 kW.

External links

Technical data (Czech)

Schema of first tower

Schema of second tower
* * http://www.prostor-ad.cz/pruvodce/pvychod/cbrod/vysilac.htm
{{DEFAULTSORT:Rks Liblice 2

Radio masts and towers in Europe Kolín District 1976 establishments in Czechoslovakia

History

Events

See also

External links