Blosenbergturm

The Blosenbergturm is a former radio transmission tower built for the German-language radio station DRS at Beromünster in the Canton of Lucerne, Switzerland, in 1937. It radiated first at 529 kHz and later at 531 kHZ, the lowest officially allocated frequency in the European medium-wave band. The Blosenbergturm is a self-radiating tower insulated against ground, i.e. the entire tower structure is used as an antenna. With a total height of 217 metres (712 ft) it is currently the sixth tallest structure in Switzerland. It has a cabin at a height of 150 m (490 ft), containing a coil for feeding the pinnacle, which is insulated against the rest of the tower, separately with high frequency power. Originally the tower was used as a dipole antenna, fed from the cabin. There was another, 126 m (413 ft) tall, freestanding lattice tower nearby, dismantled in 2011, which, like the Blosenbergturm, was a tower radiator insulated against the ground. This tower, which was built in 1931, carried – together with a second tower, which was dismantled and rebuilt at Sankt Chrischona near Basel as a television transmission tower – a T-antenna for medium wave until 1962. After this date, it was transformed into a tower radiator, serving as a backup transmitter for the Blosenbergturm itself. The aircraft warning lights on the Blosenbergturm have a special feature: at dawn, a rotating beamer above the

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