The station uses a high-frequency alternator, a massive mechanical device that generates radio waves through rapid rotation rather than electronics.
It is one of the few places worldwide where you can see a complete 1920s high-power radio installation still functional.
The antenna system spans a length of approximately two kilometers across the local countryside.
The site was officially inscribed on the UNESCO World Heritage list for its exceptional preservation of early industrial radio communication.
Transmission on the station’s specific frequency (17.2 kHz) is still performed occasionally for ceremonial purposes.
The towers were built using a design that was revolutionary for its height and structural integrity during the 1920s.
Morse code signals transmitted from this station were used to communicate with the Radio Central in New York.
The site functioned as part of a global network that allowed instantaneous communication across the Atlantic ocean for the first time.
Grimeton Radio Station, designated a UNESCO World Heritage site in 2004, is the only remaining operational Alexanderson alternator transmitter in the world. Constructed between 1922 and 1924, it originally served as a vital long-wave telegraphy link between Sweden and the United States. The site features six 127-meter-tall steel antenna towers that dominate the rural landscape of Varberg Municipality. It remains a rare example of early 20th-century high-power transatlantic radio communication technology. The museum showcases the original 200 kW transmitter and preserved historical broadcasting equipment. Visitors can observe the mechanical engineering that defined pre-vacuum tube radio telecommunications. The site is actively maintained by the Alexander Grimeton Friendship Association.
The base of the antenna towers looking upward to capture the scale of the steel lattice construction.
Check the website for the scheduled annual 'Alexanderson Day' to see the transmitter in operation.
Bring binoculars to get a better view of the massive antenna tower structure.
The surrounding park area is excellent for a walk, so wear comfortable outdoor footwear.
Assuming the station is transmitting every day; the mechanical transmitter only runs on specific ceremonial dates.
Open daily during the summer season; restricted access or closed during winter months.
No specific dress code, but observe signage regarding restricted mechanical equipment areas.
