History of Mastola and Radiomäki
Lahti is an important radio city because of its old radio broadcasting station. The Finnish Broadcasting Company was established in 1926. It was soon found that the radio broadcasting station in Helsinki was not powerful enough. The first long wave station in Finland was built in Lahti because of the city’s central location. Built in 1927, the 150-metre-high radio towers became a landmark of the city. Lahti’s broadcasting station was inaugurated on 22 April 1928.

The popularity of radio increased quickly in the 1930s, and it became necessary to expand coverage. In 1935, a new long-wave station was completed in Lahti with a powerful 150 kW Marconi transmitter

The AM station in Lahti stopped broadcasting
in 1993, as the Finnish Broadcasting Company dis-continued its long-wave service.