The Experimental Radio Station Eberswalde was an experimental radio station of the company Carl Lorenz founded in Eberswalde, Germany in 1909. It used an umbrella aerial, which was carried at a 70 metres high, guyed central mast and at the corners on 16 30 metres high timber masts, as antenna system. The central mast was a wood-latticed mast with a weight of 10,2 tons, guyed in 5 levels. As transmitters arc and machine transmitters were used, which served mainly for the purpose of telegraphy. Between January 1923 until January 1925, music transmissions were also done, although the station was never a regular broadcasting station. Starting from 1924, the station was used for short wave experiments. In 1928, the first experimental radio beacon was built on the Experimental Radio Station Eberswalde. It worked in the medium-wave band and used a triangle plane aerial, which was hung up on three 28 metres tall masts. Starting from middle of the 1930s, the Experimental Radio Station Eberswalde was gradually shut down. In 1939, the entire antenna systems including the central mast were dismantled. Starting from 1942, the buildings were used for a research centre for peat utilization.