Richtfunkstelle Berlin-Frohnau
Encyclopedia
The Richtfunkstelle Berlin-Frohnau (Directional radio station Berlin-Frohnau) was a facility for directional radio services in Frohnau (a locality in the Reinickendorf
Reinickendorf
Reinickendorf is the twelfth borough of Berlin. It encompasses the northwest of the city area, including the Berlin-Tegel Airport, Lake Tegel, spacious settlements of detached houses as well as housing estates like Märkisches Viertel.-Subdivision:...

 borough of Berlin
Berlin
Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...

). Before the German reunification
German reunification
German reunification was the process in 1990 in which the German Democratic Republic joined the Federal Republic of Germany , and when Berlin reunited into a single city, as provided by its then Grundgesetz constitution Article 23. The start of this process is commonly referred by Germans as die...

, the facility served as a directional radio link between West Berlin and West Germany.

It first used only an overhorizon directional link. For this link between 1970 and 1973 a 117.5 m high freestanding steelframe work tower was built. This tower was equipped with parabolic dishes of 18 m diameter for an overhorizon link to Gartow
Gartow-Höhbeck transmitter
Gartow-Höhbeck transmitter is a large facility for FM- and TV-transmission in Lower-Saxony, situated behalf of the community of Gartow and Höhbeck....

 in Lower Saxonia.

From 1977 to 1979 a 358.6 m high guyed mast for conventional directional service was built. It carries on a platform aerials for directional services toward Gartow
Gartow-Höhbeck transmitter
Gartow-Höhbeck transmitter is a large facility for FM- and TV-transmission in Lower-Saxony, situated behalf of the community of Gartow and Höhbeck....

 in Lower Saxony
Lower Saxony
Lower Saxony is a German state situated in north-western Germany and is second in area and fourth in population among the sixteen states of Germany...

.

At a height of 300 metres, there was a room for technical equipment measuring 4 * 5 metres. This room was the highest floor of all structures in the European Union at the time of the tower's demolition.

Since 2002 there have been test transmissions for DRM
Digital Radio Mondiale
Digital Radio Mondiale is a set of digital audio broadcasting technologies designed to work over the bands currently used for AM broadcasting, particularly shortwave...

on the medium wave frequency 1485 kHz. Because neither of the towers was designed for use as aerial for AM transmission, a long wire aerial on a 10 m high mast was built.

The radio mast was demolished on February 8, 2009 shortly after 1pm local time.

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