Mainflingen transmitter
In Mainflingen there are two major transmission facilities (long- wave and medium- wave transmitter ). They serve the civilian long wave radio (especially the spread of the time signal DCF77). Its range is doing more than 2000 km, which all of Central Europe is covered and receive about 100 million watches a radio time signal. They are operated since 2007 by Media Broadcast.
- 2.1 Location
Longwave transmitter
The longwave transmitter, which is located on a fully fenced area, consists of twelve to earth insulated, guyed lattice steel masts with heights from 100 to 220 meters, at which T and triangular patch antennas are mounted. They are used by long-wave transmitters, whose call sign begins with DCF.
The most famous of these stations is DCF77, for transmission controlled by an atomic clock time signal. The time signal is controlled by the Physikalisch-Technische Bundesanstalt. Similarly, the signal of the European radio ripple control ( ERC) and the DCF49 DCF42 DGPS signal is spread. The transmission of the timing pulses launched on 1 January 1959. Was only in August 1970, the 24 - hour continuous operation was recorded. Previously, the signals were transmitted only in the morning. Today, the signals are transmitted in the second rhythm and comply with the international time UTC system. The spread via DCF77 time information represents the official time of the Federal Republic of Germany
In addition to the broadcasting center is also a cell tower in precast concrete construction.
South of the main resort, outside the curtilage, but still north of the A 3 is yet another transmitting antenna for long wave in the form of a suspended two guyed steel framework masts T antenna. It was built on a forest clearing where there was an older castle or deserted village with the castle houses.
By 1982, the facility served as a long-wave radio station, especially as a reserve transmitter for the station Donebach ( longwave frequency 153 kHz). For this purpose, a 142 -meter-high, insulated against ground guyed lattice steel mast with cage antenna was used with a maximum diameter of 64 meters, which was also dismantled in 1982.
Location
- Coordinates: 50 ° 0 ' 56 "N, 9 ° 0' 43 " O50.0156944444449.0118333333333 principal investment
- Coordinates: 50 ° 0 ' 27 " N, 9 ° 0' 58 " O50.00759.0161666666667 Südanlage
Medium wave transmitter
The medium wave transmitter Mainflingen was built in 1966. It is also referred to as Mainflingen B and is in contrast to the long wave transmitter south of the A 3 As antenna system, a 95 -meter-high, insulated against ground steel truss mast is being used.
Until 1978 Mainflingen was also reserve location for all medium-wave frequencies of the Germany radio on the frequency 1539 kHz. For this, there was a 144 -meter-high, insulated against ground steel truss mast with cage antenna. By 1983, still existed a crossed dipole antenna that was attached in 75 meters height at five 88 -meter-high, insulated against ground steel truss masts. On 1 January 1995, the broadcast of the Germany radio via the transmitter Mainflingen was abandoned because the antenna had a poor efficiency and the transmitter Heusweiler was recruited as a replacement. By 1983, a suspended two 85 meter high masts in 75 meters dipole antenna was used during the night hours for the dissemination of the medium wave radio program of Germany. It is mined today.
Originally the site was to be demolished, but was found from 1 July 1997, the Gospel broadcasting as tenant. This led in 2005 to build a new crossed dipole antenna for 2.4 million euros, which is used from 1 April 2006 for the remote receiving morning and evening. The crossed dipole antenna consists of five 80 -meter high steel framework masts, which carry the oblique cross dipole radiating in the ionosphere. Here, the center pole is grounded, and the four border poles are isolated from ground. This crossed dipole antenna is the only antenna broadcasting in Germany, are emitted via the circularly -polarized radio waves and next to the decommissioned in July 1995 and now dismantled crossed dipole antenna of the former RIAS radio station in Berlin- Britz, the only one of its kind in Germany.
The medium wave transmitter was switched off for reasons of cost by the ERF on 31 December 2011. On March 5, 2012 it was announced that the last potential tenant had jumped off and the plant will now be demolished.
Location
- Coordinates: 50 ° 0 ' 5 " N, 8 ° 58' 31" O50.0013888888898.9752288888889
History
The radio transmission system began its work on 1 October 1949, a modern mobile transmitter, which worked until the following year as long as were up to the big masts and buildings necessary for the actual operation built. Since 22 November 2006, weather data are transmitted via the transmitter DCF77 and HBG next disaster messages. Appropriately equipped clocks are thus able to display a four-day weather forecast for 60 regions in Europe. By 2007, included the transmission facilities of the German Telekom subsidiary T-Systems, from which the former subsidiary Media Broadcast dissolved, the French network operator TDF been a member since January 2008. Since 2008, the terrain is quite strong conservation area, on the face of the rare sand Magerrasen growing. The area is managed by a shepherd, who may graze on the lawn once a year with his flock of sheep.