The Sender Donebach was a 500-kilowatt long wave radio transmitter operating on 153 kHz and transmitting the program of German public broadcaster Deutschlandfunk. The facility, which was the property of Media Broadcast, was built between 1965 and 1967 on a former airfield, and entered service on March 10, 1967. It was part of an omnidirectional aerial, consisting of four 200-metre-high radio masts, which were connected using wires on their tops. The middle mast was fed via radio power. This very efficient transmission aerial led to interference with the Romanian transmitter Braşov on the same frequency, so only 70 kilowatts of power were used, instead of 250. But even with this reduced power, interference to Braşov occurred, so in 1972 the radio facility Donebach was rebuilt as a directional aerial with a minimum towards Braşov. Therefore, two radio masts were taken down and the remaining two were rebuilt as umbrella aerials. This made a transmission power of 250 kilowatts possible. The

Geneva Frequency Plan of 1975 The Geneva Frequency Plan of 1975 (Aka "The Final Acts of the Regional Administrative LF/MF Broadcasting Conference (Regions 1 and 3) Geneva, 1975" or simply "GE75") is the internationally agreed frequency plan which was drawn up to implement th ...

set new power limits to the Donebach transmitter and now there was a daytime operation with 500 kilowatts and a night time operation at night time. This facility was remarkable because *the frequency of the carrier was derived from a rubidium atomic clock, which was in the station building. It was as the

carrier frequency In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an information-bearing signal for the purpose of conveying information. This carrier wave usually has a ...

of DCF77, a standard frequency. *the 363-metre-high masts were the second tallest structures in Germany, just behind the

Fernsehturm Berlin The Berliner Fernsehturm or Fernsehturm Berlin ( en, Berlin Television Tower) is a television tower in central Berlin, Germany. Located in the Marien quarter (''Marienviertel''), close to Alexanderplatz in the locality and district of Mitte, ...

Geographical coordinates of the masts

* *

Roofing & Base-Jumping

This Antenna was a popular spot among climbers and Base-Jumpers.

External links

* {{Structurae, id=20010719, title=Sendemasten Donebach * http://www.skyscraperpage.com/diagrams/?b46450 * http://www.skyscraperpage.com/diagrams/?b46451
Google maps:satellite picture
Former radio masts and towers Radio masts and towers in Germany Towers completed in 1982 1982 establishments in West Germany 2018 disestablishments in Germany Buildings and structures demolished in 2018 Buildings and structures in Neckar-Odenwald-Kreis