SAQ Grimeton 17,2 kHz

On July 2nd 2004, Grimeton Radio Station was appointed a World Heritage on UNESCO World Heritage list. It was constructed after WWI in order to cover communication across the Atlantic Ocean. They have special transmissions a couple of times each year. Read more This is the heart of the 17,2 kHz longwave transmitter, called the Alexandersson alternator, weight 50 tons!