Ravensburg-Horgenzell transmitter
Encyclopedia
Deutsche Telekom
Deutsche Telekom AG is a telecommunications company headquartered in Bonn, Germany. It is the largest telecommunications company in Europe....
used for transmitting the program of Deutschlandfunk
Deutschlandfunk
Deutschlandfunk is a German public broadcasting radio station, broadcasting national news and current affairs.-History:Broadcasting in the Federal Republic of Germany is reserved under the Basic Law to the states. This means that all public broadcasting is regionalised...
on the area of community Horgenzell northwest of Ravensburg
Ravensburg
Ravensburg is a town in Upper Swabia in Southern Germany, capital of the district of Ravensburg, Baden-Württemberg.Ravensburg was first mentioned in 1088. In the Middle Ages, it was an Imperial Free City and an important trading centre...
in Baden-Württemberg
Baden-Württemberg
Baden-Württemberg is one of the 16 states of Germany. Baden-Württemberg is in the southwestern part of the country to the east of the Upper Rhine, and is the third largest in both area and population of Germany's sixteen states, with an area of and 10.7 million inhabitants...
. It was inaugurated on August 23, 1951 and used until 1959 for transmitting the radio programme of SWF with a transmission power of 40 kW on 1538 kHz. As antenna, it used a 120 metre tall guyed ground-fed lattice steel mast radiator at 47°47'10" N and 9°31'16" E.
In 1964 after Bodenseesender took over its task, it was given from SWF to German Federal Post (Deutsche Bundespost
Deutsche Bundespost
The Deutsche Bundespost was created in 1947 as a successor to the Reichspost . Between 1947 and 1950 the enterprise was called Deutsche Post...
) and its frequency was changed to 755 kHz, in order to form a single frequency network with Cremlingen transmitter
Cremlingen transmitter
The Cremlingen transmitter is a large mediumwave transmission facility established in 1962 for transmitting the program of Deutschlandfunk on 756 kHz near Cremlingen-Abbenrode....
near Brunswick in Lower Saxony.
Because this frequency, which allowed a much better groundwave propagation, was also used by Sottens transmitter
Sottens transmitter
The Sottens Transmitter is the nationwide transmitter for French-speaking Switzerland. The transmitter is located at Sottens, Canton of Vaud, Switzerland. It is run on 765 kHz with a power of 600 kilowatts and is easily receivable during the night throughout the whole of Europe...
in Switzerland, close to its 120 metre tall mast radiator, a 80 metre tall guyed reflector mast had to be built.
At daytime a transmission power of 100 kW was used, while it had to be reduced to 30 kW at night.
The waveplan of Geneva resulted in a frequency shift together with Cremlingen transmitter
Cremlingen transmitter
The Cremlingen transmitter is a large mediumwave transmission facility established in 1962 for transmitting the program of Deutschlandfunk on 756 kHz near Cremlingen-Abbenrode....
to 756 kHz, while Sottens transmitter
Sottens transmitter
The Sottens Transmitter is the nationwide transmitter for French-speaking Switzerland. The transmitter is located at Sottens, Canton of Vaud, Switzerland. It is run on 765 kHz with a power of 600 kilowatts and is easily receivable during the night throughout the whole of Europe...
got a new frequency. The radiation minimum toward Southwest was not required any more. However a new radiation minimum toward Eastsoutheast in the direction of Timisoara in Romania, where a station on the same frequency works, was necessary according to the waveplan of Geneva. To achieve this, a new 120 metre tall ground-fed guyed lattice steel mast radiator was built northwestwards of the old 120 metre mast at 47°47'11 N and 9°31'12" E.
After its completion, the new mast worked as radiator, while the old mast got a reflector. The old 80 metre tall reflector mast, which wnt obsolete, was dismantled.
With this antenna configuration operation with 100 kW is possible 24 hours per day, at daytime with omnidirectional and at nighttime with directional radiation.