Sender Zehlendorf or Zehlendorf (radio) transmission facility was a radio transmission facility which was in service since 1936, when a short wave transmitter was built on the occasion of the Berlin 1936 Summer Olympics in Zehlendorf (a village near Oranienburg) as part of the establishment of permanent radio services. This Zehlendorf site, which until the end of World War II was referred to as the Rehmate Radio Transmission Centre (), had 26 different antennas at the time (that is, before and at the end of World War II). In 2017 the last antenna at the site was demolished by controlled implosion, ending the era of the transmission towers in Zehlendorf. History In 1945, most of the Rehmate Radio Transmission Centre was dismantled by the Soviet occupying forces as reparation, who left only three wooden radio masts. Two of these wooden masts supplied the building material for a 100-metre-tall transmission tower built at Golm in 1948, which was used until 1979. In 1952 it was decided to build at the location of the former radio transmission center Rehmate the central long wave transmitter of the GDR. For this between 1956 and 1958 a triangle plane aerial, which was hung up on three 150 metres high guyed masts of lattice steel, which were insulated against ground, was built. A second transmitting antenna, which would become the main antenna, was built between 1960 and 1962. It consisted of a , lattice steel framework mast, at which a conical cage aerial was mounted, making it the tallest structure in Europe between 1962 and 1964. With this antenna a transmitting power of 750 kilowatts in the long-wave range on a frequency, which was reduced in course of the time gradually for the reduction by interference from 185 kHz to 177 kHz, was possible. The maximum transmitting power, which was possible over the triangle plane aerial, was 500 kilowatts. On 18 May 1978 the main mast collapsed after a collision with a Russian airplane of the type Mig-21. After the cause of the collapse was certain, the Soviet Union promised to supply a new mast and to rebuild the mast. In order not to stop the progress of the construction work by the stricter German safety regulations, for the duration of the construction work the area in the radius of 300 metres was explained as Soviet exclave. In August 1979 the new mast with a height