CKMX

[4] Grant served in the British Royal Air in France during World War I, where he gained experience installing and maintaining radio equipment.

[6] In 1920, Grant began working for the Canadian Air Board's Forestry patrol, developing air-to-ground communication for the spotter aircraft used to report forest fires, initially using radiotelegraphy.

In addition to the forestry work Grant began making a series of experimental entertainment broadcasts, believed to be the first in western Canada.

In early April 1922 the Calgary Herald reported that "Residents of High River have enjoyed several concerts 'out of the atmosphere' during the past few months",[9] with VAW maintaining a regular broadcasting schedule on Tuesday and Friday evenings, on a wavelength of 360 meters (833 kHz.

In 1922 federal regulators added a new licence classification of "Private Commercial Broadcasting station",[13] and in late April 1922 an initial group of twenty-three station assignments was announced, including two in Calgary: CFAC, licensed to George M. Bell on a wavelength of 430 meters (698 kHz), and CHCQ, licensed to the Calgary Herald newspaper on 400 meters (750 kHz).

[20] In addition to operating the radio station, Grant's company sold a line of "Voice of the Prairie" brand receivers,[21] however the Westinghouse corporation sued him for infringing certain of its patents.

The call letters were changed to CKMX in the fall of 1994 when Maclean-Hunter sold it to Standard Broadcasting while retaining ownership of sister station CFCN-TV,[18] and switched the format to hot adult contemporary.

[24] On June 14, 2023, as part of a mass corporate restructuring at Bell Media, the company shut down 6 of their AM radio stations nationwide, including CKMX.

The station ended regular programming at 9 a.m. that day, replaced with a looped message about the impending shutdown, which lasted until the completion of the signoff.