A QSL for CFZM 740 Zoomer Radio, Toronto. I heard this station for the first time this year. The reception report was via their webform. Following a brief email exchange Genya Hulak was so kind to send me a fully detailed email:

The 740 AM frequency was in use by CBL (a CBC station) until 2000. But as their AM transmissions suffered from interference in downtown Toronto they left this frequency. Despite the interference issue many stations contested for this clear channel frequency. The application was granted to CHWO which moved from 1250. CJYE is their replacement on 1250. The CBC brand is still visible on the Hornby transmitter building:

CBC transmitter station at Hornby, now in use by CFZM 740

In 2007 the CHWO operations were sold and the station was rebranded to CFZM. The format is “oldies and adult standards”.