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The ''Rheinsender'' ("
The ''Rheinsender'' ("Rhine
), Surselva, Graubünden, Switzerland
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, source1_elevation =
, source2 = Rein Posteriur/Hinterrhein
, source2_location = Paradies Glacier, Graubünden, Switzerland
, source2_coordinates=
, so ...
transmitter") is an FM radio transmission site for the German Südwestrundfunk
Südwestrundfunk (SWR; ''Southwest Broadcasting'') is a regional public broadcasting corporation serving the southwest of Germany , specifically the federal states of Baden-Württemberg and Rhineland-Palatinate. The corporation has main offices ...
regional public broadcasting system. The Rheinsender is located near Wolfsheim, southwest of Mainz
Mainz () is the capital and largest city of Rhineland-Palatinate, Germany.
Mainz is on the left bank of the Rhine, opposite to the place that the Main joins the Rhine. Downstream of the confluence, the Rhine flows to the north-west, with Ma ...
.
Historically the Rhinesender was a large medium-wave
Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with more limited sound quality than FM stations on the FM broadcast band. During the daytime ...
transmission facility near. The transmitter was established in 1950 and went on the air May 15, 1950. It belonged to SWR (until 1998 to SWF) and transmitted until the middle of the 1990s with 600 kilowatts, later reduced to 100 kilowatts. In 2012 the medium-wave mast got demolished.
Today SWR is using the smaller mast for FM transmission.
History
From 1950 to 2003 two 150-metre-high guyed steel tube masts were used as the transmission aerial, which are insulated from ground and which were separated by an insulator in the mast construction electrically in two parts for double feeding as fade reducing aerial. By the usage of two masts a direction minimum toward thesoutheast
The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each sepa ...
was obtained according to international regulations when working with a transmission power of 600 kilowatts at nighttime.
Furthermore, there is a 114-metre-tall guyed steel tube mast, which is also insulated against ground. This mast, which is used as reserve antenna for medium wave broadcasting, has an FM-transmission antenna on its top. Furthermore, there is also a free-standing grounded lattice tower used for radio services in UHF/VHF-ranges.
After transmission power was reduced to 100 kilowatts a direction minimum toward the southeast was no longer necessary and running the transmitter with omnidirectional
Omnidirectional refers to the notion of existing in every direction. Omnidirectional devices include:
* Omnidirectional antenna, an antenna that radiates equally in all directions
* VHF omnidirectional range, a type of radio navigation system for ...
radiation was possible.
Hence the second radio mast was obsolete and was demolished on February 26, 2003. On the remaining radio mast of the Rhine transmitter there are also aerials for FM broadcasting
Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum ( radio waves), in a one-to-many model. Broadcasting beg ...
for SWR 4 on 94.9 MHz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one he ...
.
At the site of the demolished radio mast, a further grounded free-standing lattice tower was built in 2003. On this tower in 2004 a cage antenna was installed, which is used for broadcasting the SWR program "Das Ding" in the DRM-mode on 1485 kHz with an output power on 1 kW.
See also
*List of masts
The tallest structure in the world is the Burj Khalifa skyscraper at . Listed are guyed masts (such as telecommunication masts), self-supporting towers (such as the CN Tower), skyscrapers (such as the Willis Tower), oil platforms, electricity ...
External links
* * * http://www.skyscraperpage.com/diagrams/?b45794 * http://www.skyscraperpage.com/diagrams/?b46683 * http://www.skyscraperpage.com/diagrams/?b46684 * https://web.archive.org/web/20080320144112/http://www.waniewski.de/id382.htm {{coord, 49, 52, 42, N, 8, 03, 04, E, region:DE-RP_type:landmark, display=title Radio masts and towers in Germany Towers completed in 1950 1950 establishments in West Germany Buildings and structures in Mainz-Bingen