Bodenseesender is a radio transmission facility of SWR

Südwestrundfunk

The Südwestrundfunk is a public broadcasting company for the southwest of Germany, specifically the states of Baden-Württemberg and Rhineland-Palatinate. The company has main offices in three cities: Stuttgart, Baden-Baden and Mainz, with the director's office being in Stuttgart. It is an...

 (until 1998 SWF) near Messkirch-Rohrdorf in Southern Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 for mediumwave

Mediumwave

Medium wave is the part of the medium frequency radio band used mainly for AM radio broadcasting. For Europe the MW band ranges from 526.5 kHz to 1606.5 kHz...

 established in 1964.

Background

Bodenseesender is now used for the propagation of SWR Cont.Ra on the medium wave frequency

Frequency

Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency.The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency...

666 kHz. Until 1978 the aerial of the medium wave transmitter consisted of 4 guyed steel framework masts, which are insulated against ground. In the mid 1970s two of these masts were dismantled. One of them was rebuilt on a new site not far away from it earlier site in order to form with one of the two masts, which were not dismantled a directional aerial, while the other was rebuilt at Nierstein in Rhineland-Palatina. On the site of the latter mast a 240 metre high guyed steel framework mast was erected, which is also insulated against ground. At the construction of this mast, the length of the upper guys were chosen in such way, that there is no disturbation of its radiation pattern when grounded directly at the anchor blocks. So the upper guys do not have any intermediate insulators. They are only insulated toward the mast. However the guys of the lowest level are divided by one intermediate insulator electrically in two parts.

Until October 19, 2004 there was a shortwave transmitter on the site of the Bodenseesender, which was used to transmit the program of SWR 3 on 7265 kHz.
For the shortwave transmitter, there was a small cage aerial at 48°1'24"N and 9°7'11"E and a dipole aerial at 48°1'29"N and 9°7'5"E.

In spring 2005 the two 137 metre high guyed masts which were situated at 48° 1'19" N, 9° 7' 12" E and at 48° 1'24" N, 9° 7' 18" E were demolished.

External links

• http://www.skyscraperpage.com/diagrams/?b45792
• http://www.skyscraperpage.com/diagrams/?b45793