Lake Constance transmitter

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Lake Constance transmitter
Image of the object
The two medium-wave transmission masts
(left: 244 meters, right: 137 meters)
Basic data
Place: Messkirch - Rohrdorf
Country: Baden-Württemberg
Country: Germany
Altitude : 650  m above sea level NHN
Coordinates: 48 ° 1 '21.4 "  N , 9 ° 7' 9.8"  E
Use: Broadcasting station
Owner : Südwestrundfunk
Demolition : October 10th, 2013
Data on the transmission system
Tower / mast 1
Height: 137 m
Construction time: 1964
Operating time: 1964-1970s
Conversion antenna: -


Tower / mast 2
Height: 137 m
Construction time: 1964
Operating time: 1964-2012
Conversion antenna: 1982


Tower / mast 3
Height: 137 m
Construction time: 1964
Operating time: 1964-2005
Conversion antenna: -


Tower / mast 4
Height: 137 m
Construction time: 1964
Operating time: 1964-2005
Conversion antenna: -


Tower / mast 5
Height: 244 m
Construction time: 1970s
Operating time: 1970s – 2013
Conversion antenna: -
Wavebands : MW transmitter , SW transmitter
Radio : MW broadcasting , KW broadcasting
Send type: DRM
Shutdown : January 8, 2012
Further data
Client : Südwestfunk
Commissioning : October 24, 1964
Position map
Lake Constance transmitter (Baden-Württemberg)
Lake Constance transmitter
Lake Constance transmitter
Localization of Baden-Württemberg in Germany

The Bodensee transmitter was a transmitter of the Südwestrundfunk (formerly the Südwestfunk ) for medium wave and until 2004 also for short wave in the Messkirch district of Rohrdorf .

The transmitter was switched off and shut down by SWR on January 8, 2012. The demolition took place on October 10, 2013. SWR cont.ra , the SWR's information program , was last broadcast from this station from 5 a.m. to 11 p.m. It was broadcast on the frequency 666 kHz with a transmission power of 100 kW (up to 2007: 150 kW).

The 244 meter high guyed main transmission mast of the Lake Constance transmitter was the tallest structure in the Sigmaringen district .

history

  • Signpost to the Lake Constance transmitter on federal road 313

  • The transmitter building of the Bodensee transmitter

  • Sign of the SWR

The Bodensee transmitter was built in 1964 as the successor to the medium-wave transmitter operated by the then Südwestfunk in Bad Dürrheim , Reutlingen , Sigmaringen and Ravensburg , whose frequencies (and partly also their systems) were claimed for use by Deutschlandfunk . The short-wave transmitter from Bad Dürrheim was relocated to the Lake Constance transmitter . On October 24, 1964, the Bodensee transmitter started operating.

Medium wave

From 1964 to December 31, 1992, the Bodensee transmitter broadcast the SWF1 program on medium wave, then the new S4 Bodensee radio was switched on because there were insufficient FM frequencies available for it. At the same time, the transmission power was reduced from 300 kW to 150 kW. From July 1, 2002, SWR cont.ra was broadcast on the station. For cost reasons, from July 2005 it was only operated from 5 a.m. to 11 p.m. and on Saturdays and Sundays from 7 a.m. to 11 p.m.

The medium wave transmitter used a directional antenna until 1978 , which consisted of four self-radiating transmitter masts , each 137 meters high, isolated from the ground and arranged in a parallelogram. In the course of the introduction of the Geneva Wave Plan , one of the masts was dismantled in the mid-1970s and a 244-meter-high, self-radiating lattice mast , insulated from earth, was erected to replace the previous system of four masts. The dismantled mast was rebuilt in Nierstein, Rhineland-Hesse . Another mast of the quartet was moved a few hundred meters in 1982 to build a new directional antenna, the two remaining 137-meter transmission masts served as a reserve and were only dismantled in 2005.

With the 244 meter high transmission mast, which served as an omnidirectional antenna during the daytime and which, like all transmission masts of the Lake Constance transmitter, was insulated from earth, the guys were dimensioned so that they are earthed at the anchor blocks for the operating frequency of 666 kHz without causing parasitic radiation could and - none - except for the lowest backstay separation insulators possessed.

Geographical coordinates of the 244 meter high transmitter mast:

Geographical coordinates of the three 137 meter high transmission masts:

Shortwave

Up until October 19, 2004, a shortwave transmitter was operated on the area around the Lake Constance transmitter, which was last used to broadcast the SWR3 program on the 7265 kHz frequency . An angular dipole antenna ( 48 ° 1 ′ 29.4 ″  N , 9 ° 7 ′ 6 ″  O ) and a trap antenna ( 48 ° 1 ′ 24.3 ″  N , 9 ° 7 ′ 11.6 ″  O ) served as transmitting antennas .

From October 20, 2004, Deutsche Welle used this frequency for its program in DRM mode.

At the beginning of 2005 the shortwave transmitter and the dipole antenna were dismantled, only the trap antenna remained. The system was sold to Madagascar and is used there for the state radio Nasionaly Malagasy. In the meantime, the trap antenna for shortwave has also been removed.

Shutdown and shutdown of the transmitter

The Lake Constance transmitter was finally switched off on January 8, 2012 at 11 p.m. The SWR thus followed a requirement of the commission for the determination of the financial needs of the broadcasters , which made this a precondition for the financing of the development of a comprehensive coverage of the programs of the ARD stations via DAB + .

On February 7, 2012 at 1:41 p.m., the 137 meter high reserve transmission mast was dismantled (felled by cutting the anchor rope). The 244 meter high main transmission mast was dismantled on October 10, 2013 (felled by capping the anchor ropes with an explosive charge) after the measuring units mounted on it for the future use of wind power in the Messkirch area had fulfilled their tasks.

gallery

  • Medium wave antennas

  • The 244 meter high main transmission mast of the Lake Constance transmitter

  • Base of the 244 meter high main broadcast mast

  • The 137 meter high reserve transmission mast

  • Foot of the 137 meter high reserve transmission mast

  • Shortwave antennas

  • The former shortwave angular dipole of the Lake Constance transmitter

  • The shortwave
    trap antenna of the Lake Constance transmitter

  • Base of the shortwave
    trap antenna of the Lake Constance transmitter

Web links

Commons : Bodenseesender  - Collection of pictures, videos and audio files

Individual evidence

  1. ^ A b Gregor Moser: Explosion: Rohrdorfer SWR transmitter mast falls. In: suedkurier.de. Südkurier, October 10, 2013, accessed October 25, 2013 .
  2. ^ A b Hermann-Peter Steinmüller: A steel giant buckles. In: suedkurier.de. Südkurier, February 8, 2012, accessed February 8, 2012 .
  3. ↑ Additional information 4: Costs of program distribution, switching off medium / long wave, DAB +. (PDF; 339 KiB) (No longer available online.) In: kef-online.de. Commission to determine the financial needs of broadcasters, January 17, 2012, pp. 1–2 , archived from the original on July 22, 2013 ; Retrieved October 13, 2013 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.kef-online.de
  4. ↑ SWR: Off for medium waves. In: dxaktuell.de. DXaktuell.de, December 15, 2010, accessed on December 17, 2011 .
  5. ^ Mathias Weber: SWR gives up medium wave. In: senderfotos-bw.de. 2011, accessed December 17, 2011 .