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Ottawa, Ontario
BrandingCBC Ottawa (general)
CBC Ottawa News (newscasts)
SloganCanada's Public Broadcaster
ChannelsDigital: 25 (UHF)
Virtual: 4.1 (PSIP)
AffiliationsCBC Television (O&O)
OwnerCanadian Broadcasting Corporation
First air dateJune 2, 1953; 66 years ago (1953-06-02)
Call letters' meaningCanadian
Broadcasting Corporation
Sister station(s)CBOFT-DT, CBO-FM, CBOQ-FM
Former callsignsCBOT (1953–2011)
Former channel number(s)Analog:
4 (VHF, 1953–2011)
Transmitter power311.485 kW
Height426.4 m (1,399 ft)
Transmitter coordinates45°30′11″N 75°51′1″W / 45.50306°N 75.85028°W / 45.50306; -75.85028 (CBOT)
WebsiteCBC Ottawa

CBOT-DT, virtual channel 4.1 (UHF channel 25), is a CBC Television owned-and-operated television station located in Ottawa, Ontario, Canada. The station is owned by the Canadian Broadcasting Corporation, as part of a twinstick with Télévision de Radio-Canada station CBOFT-DT (channel 9), which is operated through its Société Radio-Canada arm. The two stations share studios at the CBC Ottawa Broadcast Centre located on Sparks Street in Downtown Ottawa, alongside the main corporate offices of the CBC. CBOT's transmitter is located on the Ryan Tower at Camp Fortune in Chelsea, Quebec, north of Gatineau. This station can also be seen on Rogers Cable channel 8 and in high definition on digital channel 514 and on Vidéotron cable 6 and in high definition on digital channel 606 in Gatineau. This station is also available on Bell TV channel 208 and in high definition on channel 1040.

CBOT-DT serves as the default CBC affiliate for the Kingston, Ontario area, after longtime CBC affiliate CKWS-DT switched affiliations to CTV on August 31, 2015. It is also the default feed on CBC's live streaming Internet video service, and the only one available in Canada without registering an account with the CBC.


Channel 4 logo used by CBOT for several years in the early 1980s.

CBOT went on the air for the first time on June 2, 1953, becoming the third television station in Canada. Before the launch of Télévision de Radio-Canada station CBOFT, CBOT aired both English language and French language programs.

During the late 1970s into the early 1980s, CBOT was known as "CBC 4 Ottawa", and its newscasts were known as CBC 4 News. In 1980, CBOT's 6 p.m. newscast was anchored by Ab Douglas, and by Joe Spence at 11:27, following The National. During the mid-1980s, the station was known as "CBOT 4", then as "CBC Ottawa".

News operation[edit]

CBOT-DT presently broadcasts ten hours and 40 minutes of locally produced newscasts each week (with two hours on weekdays, a half-hour on Saturdays and ten minutes on Sundays). CBOT airs local news programming in the form of a 90-minute newscast from 5 to 6:30 p.m. and a half-hour newscast at 11 p.m. on weekdays. On weekends, the station airs a half-hour 6 p.m. newscast on Saturdays and a ten-minute summary airs on Sundays at 11 p.m.

Notable current on–air staff[edit]

  • Ian Black (CMOS-endorsed weathercaster) - meteorologist; weeknights

Notable former on–air staff[edit]


CBOT operated six analog television rebroadcasters in Eastern Ontario and included communities such as Pembroke. Due to federal funding reductions to the CBC, in April 2012, the CBC responded with substantial budget cuts, which included shutting down CBC's and Radio-Canada's remaining analog transmitters on July 31, 2012.[1] None of CBC's or Radio-Canada's television rebroadcasters were converted to digital.

Former rebroadcasters[edit]

Station City of licence Channel ERP HAAT Transmitter Coordinates CRTC/Notes
CBOT-1 Foymount 14 (UHF) 42.3 kW 229.2 m 45°25′48″N 77°18′14″W / 45.43000°N 77.30389°W / 45.43000; -77.30389 (CBOT-1) 91-638
CBOT-2 Barry's Bay 19 (UHF) 8.6 kW 170.4 m 45°29′23″N 77°42′56″W / 45.48972°N 77.71556°W / 45.48972; -77.71556 (CBOT-2)
CBOT-3 Whitney 9 (VHF) 0.01 kW NA 45°29′18″N 78°12′22″W / 45.48833°N 78.20611°W / 45.48833; -78.20611 (CBOT-3)
CBOT-4 Maynooth 51 (UHF) 1.535 kW 121.5 m 45°13′37″N 77°52′29″W / 45.22694°N 77.87472°W / 45.22694; -77.87472 (CBOT-4)
CBOT-5 McArthur's Mills 33 (UHF) 4.286 kW 125.3 m 45°5′18″N 77°38′49″W / 45.08833°N 77.64694°W / 45.08833; -77.64694 (CBOT-5)
CBOT-6 Deep River/
3 (VHF) 43.3 kW 152.2 m 46°2′40″N 77°28′4″W / 46.04444°N 77.46778°W / 46.04444; -77.46778 (CBOT-6) 90-1077

Digital television[edit]

Digital channel[edit]

Channel Video Aspect PSIP short name Programming[2] Carrier frequency Modulation Symbol rate
4.1 720p 16:9 CBOT-DT Main CBOT-DT programming / CBC Television 537250 kHz 8VSB 6000000

Analogue-to-digital conversion[edit]

On August 31, 2011, when Canadian television stations in CRTC-designated mandatory markets transitioned from analogue to digital broadcasts,[3] the station's digital signal remained on UHF channel 25. However, through the use of PSIP, digital television receivers display CBOT-DT's virtual channel as 4.1.


External links[edit]