CJCB is a Canadian radio station broadcasting from Sydney, Nova Scotia at 1270 AM.

CJCB is the current broadcast partner of the Cape Breton Eagles hockey team of the QMJHL.

On May 28, 2019, the CRTC approved an application by Maritime Broadcasting System Limited to change the authorized nighttime contours of the English-language commercial radio programming undertaking CJCB Sydney, Nova Scotia by decreasing the nighttime transmitter power from 10,000 to 1,350 watts.

Due to an antenna system failure, CJCB had been operating at 1,350 watts at night for several years.

No listener complaints were received about CJCB's poor reception so it was decided to make the nighttime power reduction permanent to keep operational costs at a minimum.