The station was launched in 1955 by Sun Parlor Broadcasting at 710 AM, as a daytimer with a 250-watt transmitter, using the callsignCJSP. The principal shareholders in Sun Parlour Broadcasting were Al Bruner, John Garton Sr., Lou Tomasi and Art Gadd. The station increased its power to 1,000 watts in 1960. The "SP" in the call sign stood for "Sun Parlour," a nickname for the Leamington/southern Essex County region of Ontario. CJSP was a small-town station typical of its era with a variety of programming including a Top 40 show; the station distributed a record survey called "The Fascinatin' Fifty" in that era. In late 1967, the station adopted its current callsign, and received approval from the Canadian Radio-television and Telecommunications Commission to broadcast at nighttime; due to clear channel rules, the station remained on 710 during the day, but shifted to 730 at night. The switch in frequency was called fine tuning time and was accompanied by a Lou Tomasi voiced 60-second audio bed series of varying-pitched beeps which helped the listener re-tune to the station where they would be told "you're back on the beam with Cheer Radio". The nighttime station also used a different callsign, CHIR, but retained the same Cheer branding. During its years of operation on two frequencies, the station had two licenses, one for each call sign. In 1968, the station was sold to Rogers Communications, although Sun Parlour Broadcasting continued to operate as a separate subsidiary. As "Channel Seven, Cheer Radio," CHYR/CHIR aired a very contemporary and upbeat MORmusic format bordering on Top 40, an approach that might be today considered Hot AC. In the mid seventies they started to spell out the daytime call letters on-air "C-H-Y-R" as well as use the phrase "Super Seven Cheer" and variations with a new Pepper/Tanner jingle package, but overall the format approach and on-air policy was always "bright, tight, brief and real!" In 1974, the CHIR calls were quietly abandoned, and the nighttime transmitter's call sign instead became CHYR-7. The station increased its nighttime power from 250 to 500 watts that year. In 1975, Keith Dancy acquired Sun Parlour Broadcasting from Rogers, although two years later he sold the station back to Rogers, along with CKJD in Sarnia, in exchange for CHIQ in Hamilton.
In 1987, the station's ownership was spun off to Blue Water Broadcasting, a subsidiary of Maclean-Hunter. Four years later, the station dropped its longtime adult contemporary sound for a country music format, citing listener demand for Canadian country music as an impetus for the change. In 1993, the station received CRTC approval to move to the FM band. In preparation for the move, most of the AM transmitter towers had to be demolished to make room for the new FM tower; as a result, the 730 frequency was abandoned and the station operated full-time at reduced power on 710 for a few months. The move to FM was completed in July of that year. After a brief period of simulcasting, CHYR ceased operations on 710 kHz at 6 p.m. on September 10, 1993. In 1994, Maclean-Hunter was acquired by Rogers, and The Blue Water group was sold to Blackburn Radio.
96.7 Cheer-FM/Mix 96.7
On April 22, 2001, the station abruptly dropped its country format after 10 years in favor of Hot AC branded as 96.7 Cheer-FM, reviving the heritage "Cheer" name. Market vet Tim O'Neill took over mornings and Corey Robertson arrived in late 2001 for afternoons. On January 3, 2007, CHYR FM moved its broadcast tower from just outside Point Pelee to a new tower in Cottam, making the signal available to over 70 thousand more homes. On March 3, 2008, the station rebranded as Mix 96.7. In 2016, a new station on 96.7 MHz signed-on in the New Center neighbourhood of Detroit, Michigan, causing a substantial reduction in CHYR-FM's signal to Detroit, with interference stretching from Livonia and Redford to Warren and portions of the west end of Windsor.
