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CFYK-FM is a Canadian radio station broadcasting at 98.9 MHz (FM) in Yellowknife, Northwest Territories. The station is owned by the Canadian Broadcasting Corporation and broadcasts national programming of the CBC Radio One network along with regional programs as part of CBC North.

History
CFYK began broadcasting on January 15, 1950. Like other radio stations in Northern Canada at the time, CFYK was licensed to the Canadian Army's Royal Canadian Corps of Signals and utilized the technical infrastructure of the Northwest Territories and Yukon Radio System, but was managed by a civilian committee and operated by volunteers as a commercial-free community radio station.

Initially, programming consisted entirely of local content created by residents of Yellowknife, including schoolchildren and anybody who wished to be heard on the radio. By 1952, the CBC began regularly supplying the station with tape recordings of CBC programming to broadcast in addition to local content.

In 1958, the CBC announced it would create a new radio network (now known as CBC North) to target Northern Canada. To establish the service, the corporation would take over the operations of existing volunteer-run radio stations, turning them into CBC-owned outlets staffed by CBC employees. As part of this process, ownership of CFYK was formally transferred to the CBC on December 13, 1958.

Upon sign-on, CFYK was an AM station operating on a frequency of 1450 kHz with 250 watts of power. In 1952, the frequency was changed to 1340 kHz in order to alleviate interference to air search and rescue operations near Yellowknife. The station continued to operate at a power of 250 watts until 1965, when the power was increased to 1,000 watts. Subsequent power increases occurred in the 1980s, with the station receiving approval to operate at 2,500 watts during the day and at 4,000 watts at night, although the increased power at night was later discontinued and the station went to operating at 2,500 watts around the clock.

On July 10, 2012, the CBC applied to move CFYK to FM on a frequency of 98.9 MHz with an effective radiated power of 1,220 watts from an antenna height above average terrain of 50 m. The move was approved on November 7, 2012. The switch from AM to FM took place on June 3, 2013, at which time the station became CFYK-FM, a call sign originally used by a relay transmitter of CBU-FM that has since been renamed CBNY-FM.

On November 28, 2013, the CBC received approval to modify CFYK's technical parameters, including increasing the effective radiated power to 5,000 watts and increasing the antenna height above average terrain to 50 m.

In addition, the new transmitter will broadcast at 5500 watts (up from the proposed 1200 watts) on a non-directional antenna, with its effective height of antenna above average terrain increasing from 46.6 metres to 50 metres. In addition, the station will carry the CFYK-FM callsign, which has been used for a local repeater of Vancouver's CBC Music outlet, CBU-FM, at 95.3 MHz; that repeater was renamed CBNY-FM after CFYK moved to FM.

Local programming
CFYK produces all of CBC Radio's local programs in the Northwest Territories, including The Trailbreaker on weekday mornings, the noon-hour program Northwind, Trail's End in the afternoon, and Northern Air on weekend mornings.

The station's afternoon programming also differs significantly from the rest of the network. Afternoon programming such as Q is pre-empted; instead, the station airs afternoon programming in First Nations languages. CHAK in Inuvik, while airing the same regular local programming schedule as CFYK, produces a distinct schedule of First Nations programming in the afternoons.

Rebroadcasters
CFYK has the following rebroadcasters:

Relocations to FM
The CBC applied with the CRTC to convert the following AM transmitters to FM:


 * On April 19, 2013, applied to convert CBQC 1230 to 98.9 MHz. The application was approved on September 19, 2013.
 * On May 29, 2013, applied to convert CBDO 690 to 107.5 MHz. This application was approved on October 16, 2013.
 * On January 16, 2017, applied to convert CBDI 860 to 97.9 MHz. The CRTC approved the application on March 17, 2017. The callsign was then changed to CFYK-FM-1.

CBQG is the last remaining low-power AM transmitter to rebroadcast CFYK-FM.