CBL was the English language outlet for the Canadian Broadcasting Corporation (CBC) for Toronto for many decades. CBL’s predecessor CKGW signed on in 1925 on 910 kHz. After some frequency moves and call sign changes, CBL settled on 740 kHz in 1941. In June 1999, CBL vacated 740 kHz. CBC’s FM outlet 99.1 MHz was assigned the call sign CBLA-FM after CBL-740 left the air

CBL would sneak in on 740 on winter mornings when I lived in Spokane and in Utah. I sent them a report from Spokane in 1977 and they sent me the QSL below