|City of license||Edmonton, Alberta|
|Broadcast area||Northern Alberta|
|Branding||CBC Radio One|
|Frequency||740 KHz (AM)|
|First air date||1948|
|Owner||Canadian Broadcasting Corporation|
|Sister stations||CBX-FM, CHFA, CBCX-FM, CBXT, CBXFT|
CBX is a Canadian radio station, broadcasting at 740 AM in Edmonton, Alberta. It broadcasts the programming of the CBC Radio One network. CBX is a Class B station broadcasting on a Canadian clear-channel frequency; the dominant station on 740 AM is CFZM in Toronto, Ontario.
It is the second most listened-to radio station in the Edmonton market according to the Fall 2014 PPM ratings.
The station was originally launched in 1948, serving both Edmonton and Calgary from a single 50,000 watt transmitter site at Lacombe, near Red Deer, on AM 1010. Prior to its launch, CBC Radio programming aired in Edmonton on private affiliate CFRN 1260. In 1953, with signal reception in the city deteriorating, the rebroadcaster CBXA was launched on 740.
In 1964, the CBC launched separate radio services in Edmonton and Calgary. CBX's 1010 frequency was reassigned to Calgary and used by CBR. CBXA was decommissioned, and the CBX transmitter was relocated closer to Edmonton on CBXA's frequency of 740.
In 2004, CBC Edmonton operations moved into a new digital broadcast facility downtown, bringing all operations of Radio and TV, under one roof. The old TV facility on 75th Street had 70,000 square feet (6,500 m2), while the Radio building on 51st Ave. had 48,000 square feet (4,500 m2). The new combined facility has 38,700 total square feet. It is located at the Edmonton City Centre, on Winston Churchill Square.
On March 16, 2006, the Canadian Radio-television and Telecommunications Commission approved the station's application to add an FM transmitter at 93.9 MHz in Edmonton to simulcast the AM programming. This relay, CBX-2-FM, officially began April 20, 2007.
Local programs produced by CBC Edmonton and aired on CBX include Edmonton AM, and Radio Active. CBX also produces half-hourly news bulletins between 5:30 AM and 6:00 PM each weekday. Provincial or national news bulletins air on CBX outside of those hours. World Report and The World This Hour also airs at the top of each hour during Edmonton AM and Radio Active, respectively.
The last few BBM radio ratings measurements have shown CBX steadily climbing in audience share in Edmonton. As of the spring 2009 BBM measurement, CBX is the second-most listened to radio-station in Edmonton, behind news-talk radio station CHED. Edmonton AM also ranks second in the morning, while Radio Active ranks fourth amongst the afternoon radio drive-time shows.
|City of license||Identifier||Frequency||Power||RECNet|
|Bonnyville||CBX-1-FM||92.9 FM||55,500 watts||Query|
|Chateh||CBXA-FM||103.5 FM||983 watts||Query|
|Edmonton||CBX-2-FM||93.9 FM||3,931 watts||Query|
|Edson||CBXD-FM||95.3 FM||50 watts||Query|
|Fort McMurray||CBXN-FM||99.3 FM||20,000 watts||Query|
|Fort Vermilion||CBXF-FM||105.1 FM||50 watts||Query|
|Fox Creek||CBXV-FM||91.3 FM||38 watts||Query|
|Fox Lake||CBXK-FM||96.9 FM||425 watts||Query|
|Grande Cache||CBXC-FM||92.3 FM||50 watts||Query|
|Grande Prairie||CBXP-FM||102.5 FM||100,000 watts||Query|
|High Level||CBXL-FM||99.5 FM||50 watts||Query|
|Hinton||CBXI-FM||88.1 FM||3,000 watts||Query|
|Jasper||CBXJ-FM||98.1 FM||259 watts||Query|
|John D'Or Prairie||CBXH-FM||102.5 FM||230 watts||Query|
|Manning||CBXM-FM||100.5 FM||13,500 watts||Query|
|Peace River||CBXG-FM||93.9 FM||822 watts||Query|
|Rainbow Lake||CBXW-FM||101.5 FM||50 watts||Query|
|Swan Hills||CBXS-FM||91.5 FM||88 watts||Query|
On September 10, 2012, the CBC applied to move the following CBC low-power AM transmitters to the FM band. The CBC received approval on January 31, 2013 to convert the remaining AM transmitters to the FM band and the new FM transmitters will operate on these following frequencies: 
- Edson – CBXD 1540 – to 95.3 with 50 watts
- Fort Vermilion – CBKC 1460 – to 105.1 with 50 watts (new callsign CBXF)
- Grande Cache – CBWI 1450 – to 92.3 with 50 watts (new callsign CBXC)
- High Level – CBKD 1560 – to 99.5 with 50 watts (new callsign CBXL) (originally approved to move to 88.1 in 1986)
- Rainbow Lake – CBXX 1240 – to 101.5 with 50 watts (new callsign CBXW-FM)
On October 25, 2013, the CRTC approved the CBC's application to delete the following low-power AM transmitter, CBXH John D'Or Prairie. An FM transmitter operates at 102.5 FM as CBXH-FM. 
The AM transmitters were deleted once the new FM transmitters commenced operation.
- (Further information: List of defunct CBC radio transmitters in Canada)
- "PPM Top-line Radio Statistics - Edmonton CMA (September 1-November 30, 2014)" (PDF). Numeris. December 10, 2014. Retrieved February 20, 2015.
- Broadcasting Decision CRTC 2006-84
- Broadcasting Decision CRTC 2013-31, CBX Edmonton – New transmitters in Edson, Grande Cache, High Level, Fort Vermilion and Rainbow Lake, CRTC, January 31, 2013
- Decision CRTC 86-369
- Broadcasting Decision CRTC 2013-566, Various radio stations – Deletion of rebroadcasting transmitters, October 25, 2013
- CBC Edmonton
- CBX history at Canadian Communications Foundation
- Query the REC's Canadian station database for CBX