The Finnish Radio Symphony Orchestra (Finnish: Radion sinfoniaorkesteri, Swedish: Radions symfoniorkester) is a Finnish broadcast orchestra based in Helsinki, and the orchestra of the Finnish Broadcasting Company (Yle). The orchestra primarily gives concerts at the Helsinki Music Centre. Primary funding comes from television licence fees from the Finnish population.
The ensemble was founded in 1927 as the Radio Orchestra with ten musicians, with Erkki Linko as its first conductor. Though never holding the title of chief conductor, Linko remained affiliated with the orchestra until 1952. Toivo Haapanen became the orchestra's first chief conductor in 1929 and held the post until his death in 1950. The orchestra performed mainly studio concerts for the first portion of its history. Until World War II, the orchestra gave only 20 public concerts, with freelance musicians to bolster the ranks.
After World War II, with the new Director General Hella Wuolijoki in place, the orchestra roster expanded to 50 musicians. In September 1947, the orchestra initiated a series of "Tuesday Concerts" at Helsinki Town Hall. The roster grew to 67 musicians by 1953. The orchestra's second chief conductor, Nils-Eric Fougstedt, served from 1950 until his death in 1961, and expanded the orchestra's repertoire. The third chief conductor, Paavo Berglund, had been a violinist in the orchestra 10 years prior to his 1961 accession to the chief conductorship. The ensemble had grown to 90 members in the 1970s, into a full symphony orchestra.