CBO-FM 91.5 FM (CBC Radio One Ottawa)

CBO-FM established in 1924 is a CBC Radio One station broadcasting on a frequency of 91.5 MHz. Canadian Railway established CKCH on a frequency of 690 kHz on Feb 27, 1924 and changed its calls to CNRO with new frequency of 840 kHz in Jan 1927. The old 690 kHz frequency was restored in Feb 1927. The frequency was changed to 600 kHz in Sep 1929. Canadian Radio Broadcasting Commission (CRBC) acquired Canadian National Railway (CNR) stations in March 1933 and renamed the calls of CNRO as CRCO on April 16, 1933. CRBC was rebranded as CBC on Nov 2, 1936 thus contributing to the change in the name of the channel: CBO in Oct 1937. It gained the status of Class III-B on March 29, 1941and moved to 910 kHz under the umbrella of the Havana Treaty. By 1950 the channel was operating on an ERP of 5,000 w in daytimes and increased it for nights too as well in 1956.

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