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Cbc radio one prince-george.svg
CityOttawa, Ontario
Broadcast areaNational Capital Region, Eastern Ontario, Western Quebec and Upstate New York
BrandingCBC Radio One
Frequency91.5 MHz[1]
First air dateFebruary 27, 1924
Formatpublic broadcasting
ERP84,000 watts
HAAT323 meters (1,060 ft)
Callsign meaningCanadian Broadcasting Corporation Ottawa
Former callsignsCKCH (1924)
CNRO (1924-1933)
CRCO (1933-1937)
Former frequencies690 kHz (1924-1927, 1927-1929)
840 kHz (1927)
600 kHz (1929-1941)
910 kHz (1941-1977)
920 kHz (1977-1991)
OwnerCanadian Broadcasting Corporation

CBO-FM is a Canadian radio station. It is the CBC Radio One station in Ottawa, Ontario, airing at 91.5 FM, and serves much of Eastern Ontario through a network of relay transmitters. CBO's Ottawa-area transmitter is located in Camp Fortune, Quebec, while its studios are located in the CBC Ottawa Broadcast Centre on Sparks Street.


CNRO was launched on February 27, 1924 as CKCH a Canadian National Railway radio network station, and adopted the CNRO call sign on July 16, 1924, in order to indicate its network affiliation.[2] The station was the first to broadcast the time signal from the Dominion Observatory in Ottawa, doing so daily at 9 pm.[3] It operated on 690 AM and later switched to 600. In 1933, the station was taken over by the CBC's predecessor, the Canadian Radio Broadcasting Commission and became CRCO on 880 kHz. The call sign changed to CBO in 1937 when ownership was transferred to the CBC.[2] Later frequency changes to 910 in 1941 and to 920 in 1977 (the latter accompanied by a power boost to 50,000 watts) [4] were followed by a move to 91.5 FM in 1991. [5] The call sign of the existing CBO-FM station (103.3, part of the CBC Stereo network) was then changed to CBOQ-FM. From 1924, the station's studios were located on the sixth floor of the Château Laurier Hotel in downtown Ottawa, a legacy of its origins with the Canadian National Railway which had also owned the hotel. In 2004, the station left the Château Laurier, closing the oldest operating radio studios in Canada, and moved to the new CBC Ottawa Broadcast Centre on Sparks Street as part of a consolidation of various Ottawa CBC facilities.

Local programming[edit]

The station's local programs are Ottawa Morning and All in a Day in the afternoon. However, most of the relay transmitters air the Toronto-originated Ontario Morning in place of Ottawa Morning. Unlike most Radio One stations, which air provincewide morning programs on Saturdays and Sundays, the station also produces its own Saturday morning show, In Town and Out.

In addition, CBO-FM produces the regional noon news and talk program Ontario Today, which airs on all CBC Radio One stations in Ontario including Toronto, and the national network program, The House. It also formerly produced Bandwidth, a music show which aired on all Radio One stations in Ontario outside of Toronto until 2014.


Rebroadcasters of CBO-FM
City of license Identifier Frequency Power Class RECNet CRTC Decision
Brockville CBOB-FM 91.9 FM 1,080 watts A Query 2007-399
Cornwall CBOC-FM 95.5 FM 3,000 watts A Query
Deep River CBCD-FM-1 97.9 FM 50 watts LP Query 2014-504
Kingston CBCK-FM 107.5 FM 100,000 watts C1 Query 98-42
Maniwaki, Quebec CBOM 710 AM 40 watts LP Query 86-21
Pembroke CBCD-FM 92.5 FM 100,000 watts C1 Query 94-932
Whitney CBCW-FM 98.5 FM 162 watts A1 Query
Belleville CBO-FM-1 104.7 FM 10,000 watts B1 Query 2018-375

On November 9, 1989, CHEZ-FM Inc. was denied a licence to add a new FM transmitter at Carleton Place on 92.3 MHz to rebroadcast the programming of the CBC's English-language AM network CBO Ottawa.[6]

On July 5, 2010, the CBC applied to change CBOB-FM Brockville frequency from 106.5 to 91.9 MHz which received CRTC approval on November 10, 2010.[7]

On June 2, 2014, the CBC submitted an application to convert CBLI Deep River from 1110 kHz to 97.9 MHz. This application was approved on September 30, 2014.[8] The callsign sign CBCD-FM-1 was chosen for the new FM transmitter to replace CBLI.

On June 29, 2018, the CBC submitted an application to add a new Radio One FM transmitter at Belleville. The new transmitter will operate at 104.7 MHz with the proposed callsign CBO-FM-1. [9] The CRTC approved the CBC's application on September 26, 2018. [10]

AM rebroadcaster[edit]

CBOM on 710 kHz (AM) in Maniwaki, Quebec is CBO-FM's only rebroadcaster outside Ontario and currently the last remaining AM transmitters to rebroadcast CBO-FM.


  1. ^ Decision CRTC 89-835
  2. ^ a b CKCH/CNRO-AM Ottawa (1924-1937 - known today as CBO) at Canadian Communications Foundation
  3. ^ http://www.cbc.ca/news/canada/newfoundland-labrador/the-beginning-of-the-long-dash-indicates-75-years-of-official-time-on-cbc-1.2823599
  4. ^ Decision CRTC 75-18 The Ottawa Journal from Ottawa, · Page 17, January 22, 1975 newspapers.com
  5. ^ Decision CRTC 89-835
  6. ^ Decision CRTC 89-836
  7. ^ Broadcasting Decision CRTC 2010-838
  8. ^ Broadcasting Decision CRTC 2014-504, CBO-FM in Ottawa - New FM transmitter in Deep River, CRTC, September 30, 2014
  9. ^ 2018-0481-5
  10. ^ Broadcasting Decision CRTC 2018-375, CBO-FM Ottawa – New transmitter in Belleville, CRTC, September 26, 2018

External links[edit]

Coordinates: 45°25′17″N 75°42′00″W / 45.4213°N 75.7000°W / 45.4213; -75.7000