CHJJ-FM (90.7 MHz) is a listener-supported non-commercial station in Cobourg, Ontario.

In 2007, the station originally began operating as a rebroadcaster of CKJJ-FM Belleville, Ontario.

[1] On January 26, 2010, UCB was denied a licence by the Canadian Radio-television and Telecommunications Commission to change CKJJ-FM-1's frequency to 90.7 MHz.

[2] They would apply for it again on September 27, 2010,[3] this time receiving approval on February 21, 2011,[4] after the original repeater was forced to close down following the launch of CIYM-FM 100.9 in Brighton.

CHJJ-FM began on-air tests at 90.7 FM in December 2011 and officially launched on September 8, 2012.