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The Fernmeldeturm Berlin (Telecommunications Tower Berlin) is a telecommunication tower on the Schaefer Mountain (338 feet or 103m above sea level) in Berlin-Wannsee. The tower was built between 1961 and 1964, and is not open to the public.
The Fernmeldeturm Berlin is 695 feet (212m) tall, the concrete shaft of which extends to a height of 613 feet (187m). Between 333 feet (101m) and 434 feet (132m) in elevation, the tower sports six floors for technical equipment. This currently consists of transmitters for digital television, analog FM radio, and newer digital radio. From 1964 to the early nineties, the tower was also used to implement a line-of-sight directional radio link to the former Federal Republic of Germany (counterparts at Torfaus and Clenze). To that end the tower was equipped with two parabolic dish antennas, each 59 feet (18m) in diameter, which were mounted on the lower portion of the tower. These were removed in 1996.
Because of these aerials, the Fernmeldeturm Berlin had to be designed to withstand much higher wind loading than, say, the TV tower in Stuttgart, which has a similar height. The concrete shaft is thus 40 feet (12m) in diameter at the bottom, with a wall thickness of 22 inches. At the 318 foot (97m) mark, the shaft is nigh 23 feet (7m) in diameter.
Directly adjacent to the Fernmeldeturm Berlin is a free standing steel framework tower, which formerly sported two 33 foot (10m) diameter parabolic aerials for a line-of-sight radio link, but these have since been removed. It is now predominantly used for cellular phone traffic.
Since 2001, the Fernmeldeturm Berlin is also used for transmissions in the medium-wave range on 1485 kHz in DRM mode. Since the tower was not designed to accommodate this frequency range, a long wire aerial was installed for this purpose.
See also
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52°25′02″N 13°07′39″E / 52.41722°N 13.12750°E / 52.41722; 13.12750
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