HD Radio is too low powered compared to regular FM to have good coverage. WOMC Detroit easily exceeds 120 km on regular FM when you head towards London on the 402. The HD signal starts breaking up right in Sarnia which is about 80 km from Ferndale, Michigan. 

That is actually a good question because signal drop outs have always been severe on AM HD radio stations. During the daytime CHLO is 10 watts digital. The closer to Ashgrove (near Georgetown) you get, the more solid the digital side of the broadcast becomes. Their daytime power is higher than their night power in both standard AM and HD. It always takes a few seconds for the digital to decode. 

A very limited number of former AM only stations in the United States now use the 100% digital mode without the analog. These are supposed to be technically superior to the hybrid broadcasts. 
 

Did they attempt to steal copper? That's what happened to the former CKCO-TV-3 (channel 42) site in Lambton County a number of years ago. 

It would still be KX Country. 

Many AM broadcasters changed dial positions over the years. Here are the Ontario stations from about 1950 to now.

CBEF : 540 to 1550  Windsor 
CHYM : 1490 to 570  Kitchener*
CKTB : 620 to 610  St. Catharines
CFGM (a) : 1310 to 1320  
CFGM (b) : 1320 to 640  Richmond Hill
CHFI : 1540 to 680  Toronto
CJRN : 1600 to 710  Niagara Falls
CKGB : 680 to 750  Timmins
CIAO : 790 to 530  Brampton
CHAM : 1280 to 820  Hamilton*
CFTJ : (a) 1110 to 1320
CFTJ : (b) 1320 to 960  Cambridge
CKKW : 1320 to 1090  Kitchener
CKJD : 1250 to 1110  Sarnia*
CJMR : 1190 to 1320  Mississauga
CHWO : 1250 to 740  Oakville / Toronto*
CHLO :  680 to 1570  St. Thomas / London
CHNR :  1560 to 1600  Simcoe
CKEY :  580 to 590  Toronto
CKSL :  1290 to 1410  London
CFOS :  1470 to 560  Owen Sound*
CKDO :  1350 to 1580  Oshawa
* = vast improvement



 

It's starting to look like HD could become the next AM Stereo (not in a good way). In the U.S. they are now testing radio over ATSC 3.0 UHF signals. 

https://www.radioworld.com/columns-and-views/guest-commentaries/atsc-3-0-audio-services-the-how-and-why

On paper it appears that the coverage of the Michigan test beats all of the HD signals. WOMC-HD-1 and 2 breaks up in Sarnia as you drive. I have heard WOMC's standard FM broadcast in the London area many times. 

CKWW will need to go more in a News and Talk direction before it will work in Windsor. The only AM radio music format the worked in that market from the mid 1980's up until the 2000's was Adult Standards. CKWW remained Oldies for years because it was Windsor-Detroit rather than Windsor only like what both the current CKWW and 1960's to 1993 version of CKWW was. 
 

At night you could try these in the GTA / Southern Ontario
(1)  680 News
(2)  AM 740 / Zoomer
(3)  770 WABC
(4)  1030 WBZ Boston
(5)  1060 KYW Philly
(6)  1150 CKOC or 1220 CFAJ

Locally where I live.
(1)  580 CKWW Windsor
(2)  AM 800 CKLW Windsor
(3)  News Radio 950 WWJ Detroit
(4)  1030 WBZ Boston
(5)  WTAM 1100 Cleveland
(6)  1380 WPHM Port Huron

I now wonder if 580 CKWW and 1150 CKOC are just going to use the same music playlist. When you click advertise on either stations website they both say that they are targeting the 40-70-year old age group.

am580ckww.com
1150ckoc.com

I have a feeling 1150 will be music intensive for the first couple of years. After that time Mr. Ray might try to increase the amount of third language programming. It has been mentioned elsewhere that the Arabic language is underserved by radio stations in Southern Ontario. One possible music format is A.C. Gold which is mellow version of Oldies. 

When City TV was on channel 79, how many people could receive a clear picture from it without cable? Did many people outside of Toronto even know it was there?

107 FM is currently streaming here.

https://worldradiomap.com/ca/calgary

 

In London the U.S. stations were received over the air with unreliable reception at the cable head end on both Maclean Hunter and London Cable TV in the 1970's. By the 1980's a receiving antenna was used about 80 km closer to Detroit, and a microwave link was built, which cleared up the reception of 2 / 4 / 7 . They must have used something like that for the Erie network affiliates, and for 43 from Cleveland. By this time Rogers was the other cable system for part of the city. 

The same thing will happen to CFCO in Sarnia if they move to 91.3 FM. This is a result of WRSX Port Huron also being on 91.3 

 

Windsor had 2 CBS, 4 NBC, 7 ABC, and 9 CBC. Cable wasn't very popular there. I think the city did without a cable system up until about 1983 or so.