Their pattern nulls in my direction at night. Some suspect that they've been staying on their night pattern indefinitely, or have been running reduced power for the past few years.
CHQT 880 was my 2nd to last unheard AM from Alberta that I finally logged this past January. I remember they came in a bit earlier than expected, right at my sunset here, was in for probably no more than 3 minutes before CKLQ (Brandon, MB) came bombing in as they normally do. Other Alberta stations such as 930 CJCA and 1010 CBR are fairly common. 1140 CHRB (High River, AB) was coming in like a local all night long for a couple of months this past winter. They must've been stuck on their day pattern.
I have heard CKGO 730 here before, glad I have them checked off the list. There is a number of BC AM stations I still need. I should probably prioritize those needed Canadian AM stations considering they've been dropping like flies over the past couple of years.
I think 630 CFCO (Chatham, ON) is the most recent to apply to move to FM. Assuming they get approved, they'll probably be gone in about a year. They are fairly common here when I get my strong local WREY in a null. They are also one of the last remaining Canadian stations running C-QUAM AM-stereo. 750 CKJH also runs C-QUAM, but they have been feeding the exciter with a mono feed.