Eilvese transmitter

Eilvese transmitter was an early long-distance radiotelegraphy station at Eilvese, Germany owned by Transradio AG, used for transmission of telegrams. It went into service in 1913, exchanging commercial and diplomatic Morse code traffic on VLF frequencies with Germany's colonies, and a similar station at Tuckerton, New Jersey, USA. During World War I when the allies cut Germany's submarine telegraph cables it was one of two long-distance radiotelegraphy stations which maintained Germany's contact with the rest of the world, and was used for diplomatic negotiations between Woodrow Wilson and Kaiser Wilhelm II leading to the 1918 Armistice which ended World War I. It transmitted on 96 kHz with a 100 kW Goldschmidt alternator. There were two antennas: an umbrella antenna, which was mounted in the middle on a 250-metre-tall (820 ft) guyed mast, and at the sides by six 20-metre-tall (66 ft) wooden masts and a ring antenna, which was spun between the central mast and the radial masts. The central mast, which was grounded, but at a height of 145 metres (476 ft) divided by glass insulators, was, when built, the tallest structure in Germany. The umbrella antenna was used for frequencies around 30 kHz, the ring antenna for frequencies around 20 kHz. In 1915 the wooden ring masts were replaced by six 122-metre-tall (400 ft) guyed lattice steel masts. These masts were replaced between

Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).