|City of license||Montreal, Quebec|
|Slogan||Montreal's News-Talk Leader|
|Frequency||800 kHz (AM)|
|First air date||1945|
|Power||50,000 watts (daytime)
10,000 watts (nighttime)
|Callsign meaning||Joseph-Arthur Dupont (founder)|
|Sister stations||CHOM, CJFM, CKGM, CFCF-DT|
Owned and operated by Bell Media, it broadcasts on 800 kHz. It has a daytime power of 50,000 watts and a nighttime power of 10,000 watts, as a class B station, using a very directional antenna with different patterns day and night to protect various other stations on the same frequency. The antenna is a four-tower array.
Commonly referred to as Montreal's heritage radio station, CJAD was founded by J. Arthur Dupont in 1945, on whose name the call letters were based. In its first years, CJAD was based on De La Montagne street in Montreal (now the site of O'Sullivan College).
In 1961, CJAD was purchased by Standard Broadcasting. In 1978, control of Standard Broadcasting was purchased by Conrad Black via Hollinger Inc.. In 1985, Standard was purchased by Slaight Communications, a privately held company owned by J. Allan Slaight.
In 1962, a sister station CJFM was launched. Always separately programmed, CJFM's programming became totally different from CJAD only from about 1976. For much of its life, CJAD had a full service format. The music was mainly adult contemporary plus two specialized shows on weekends — The Bandstand with Dick Irvin, and Starlight Concert with Rod Dewar. In 1995, CJAD shifted its format to full-time news/talk, dropping all music and entertainment, save for the Sunday morning Trivia Show and the CJAD Comedy Show.
Starting in 1992 almost all of CJAD's programming was simulcast on Corus Entertainment-owned CKTS 900 in Sherbrooke. On November 19, 2006, CKTS ceased broadcasting and its licence was surrendered to the Canadian Radio-television and Telecommunications Commission (CRTC). This, according to Corus, was because of high ongoing maintenance costs that neither they nor Standard were willing to cover.
The week ending 01 September 2012 was the last for broadcasting from the 1411 Fort Street, Montreal studios of Astral stations CJAD, CHOM and Virgin Radio, where they had been since 1980.
Effective Labour Day Monday, 3 September 2012, the three stations currently broadcast from their facilities in the Bell Media Radio building at Rene-Levesque East and Papineau.
1998 Ice Storm
In 1998, all four of CJAD's broadcast towers toppled during The Ice Storm. CJAD's first attempt to get back on the air was to use CKGM's former 980 transmitter, re-tune it to 800, and CJAD would be back on the air on its frequency. This, however, turned out to be impossible as the 980 site was damaged by ice as well. It then made arrangements to broadcast on CFMB's former 1410 transmitter but the signal was extremely bad to the west. They then reached an agreement with CHUM Limited to use their CKGM transmitter on 990 kHz until new towers were erected.
A large part of the CJAD's routine program are talk shows discussing local and international news, as well as various other subjects. CJAD broadcasts a news report almost every 30 minutes on local and major international news headlight. A traffic report is also made every 15 minutes during a large portion of the day to give updates on the state of car traffic on major roads, highways and bridges in and around the city of Montreal.
CJAD is the exclusive English radio broadcaster of the CFL's Montreal Alouettes. Some game broadcasts are simulcast on sister station CHOM 97.7 FM. CJAD was the longtime English radio home of the Montreal Canadiens until the 2010-11 season. In June 2010 it was announced that then sports-talk rival CKGM will be the new English broadcaster through the 2017-18 season.
In July 2012, Bell Media, owners of CKGM, announced that English-language rights to the Canadiens could return to CJAD following its proposed acquisition of Astral Media, if its conversion of CKGM to a French-language sports station (which would have been done to satisfy ownership limits preventing the merged company from owning both CJAD and CKGM if they both broadcast in English) were approved by the CRTC.  On October 18, 2012, the CRTC rejected Bell's proposal to acquire Astral Media; since the application to convert CKGM into a French station was contingent on the approval of the Astral merger, it too was rejected.
As of September 2013,TSN 690 provides the sports updates for CJAD. Rick Moffat does the weekday morning sports,Mitch Gallo does the weekday afternoon sports and Amanda Stein does the weekend morning sports (all for CJAD and TSN).
CJAD broadcasts with 50,000 watts in the daytime and 10,000 watts at night to avoid interfering with other stations using the 800 frequency, such as the country-formatted CJBQ in Belleville, Ontario, the moribund CHRC in Quebec City (which is approximately 250 miles [160 km] away and has shut down in September 2012), and CKLW in Windsor, Ontario.
- CKTS to stop rebroadcasting CJAD, Corus press release, November 17, 2006
- Canadian Radio-television and Telecommunications Commission (2012-07-10). "Broadcasting Notice of Consultation CRTC 2012-370 (item 2)". Retrieved 2012-07-10.
- "TSN Radio 990 to become a francophone station". Canadian Press. Retrieved 10 July 2012.
- "Broadcasting Decision CRTC 2012-574". CRTC. Retrieved 18 October 2012.
- Official website
- From Mountain to the City: A Brief History of CJAD
- CJAD history at Canadian Communications Foundation
- CJAD Timeline of Announcers[dead link]
- Query the REC's Canadian station database for CJAD