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From south Overland Park, Kansas:

In my car radio at 7:00am CDT this morning on 930 kHz, KWOC in Poplar Bluff, Missouri on their 5 kW non-directional daytime pattern. Certainly not a great distance but a first time log during critical hours. Normally at this hour on this frequency, I receive either a weak WTAD or WKY before signals fade out.

KWOC-AM Radio Station Coverage Map

Bob
I've heard WKY in the Chicago area, but that was back when they were running 5KW at night.
 
I've heard WKY in the Chicago area, but that was back when they were running 5KW at night.
Back in their Top 40 days, WKY put out a decent night time signal at 5 kW. Somewhere along the line, the owners opted for a non-directional night time signal and power was lowered to 510 watts.

Bob
 
Back in their Top 40 days, WKY put out a decent night time signal at 5 kW. Somewhere along the line, the owners opted for a non-directional night time signal and power was lowered to 510 watts.

Bob
True, I heard WKY in the Chicago area several times during their Top 40 days. Not now.
 
Maybe a wording it wrong what site can I find Day/Night Pattern Change of AM Station
Do you mean the day and night patterns or the sunrise and sunset pattern change times?

Pattern change is according to sunset and sunrise at the transmitter; the FCC rounds the times for each month. The license for AMs, on the FCC site, has the times.

Go to Home - FCC Public Inspection Files and enter the call letters. Pick the call sign on the new page, then select the first button, AM Radio Information and then, to the right of the button, "view license authorization"

1620539903246.png

That will get you the license, and it will show the power/ antenna change times.
 
Regarding Sunrise Sunset time schedules:

Have you tried this FCC utility? Just enter the coordinates from fccdata.org. and use the coordinates. I've used it to set yard light timers for a few months at a time, looking at the upcoming months and averaging them. You do have to adjust for DST though (your yard lights don't have to be adjusted for DST changes as long as you don't reset the time :)), and that's kind of clunky. The list at your receiving location coordinates is also useful to see when you can try to hear Critical Hours reception. I've printed a few out to refer to in various locations.


Usually, for a given town, they are the same. In the old FCC rules like the 1960 NAB Engineering Handbook as I recall, there is a list of major cities and the SR/SS times. Some stations have asked the FCC to modify their schedule. Not sure what was behind that.

But when the late great Glen Clark designed the new 50 kW DA-2 facilities for WWJ and WXYT Detroit, just a few miles apart, some months are 15 minutes different, because of actual SR/SS times 7 or 8 minutes from the 0:15, to round to the nearest 15 minutes some months on the 15th of the month.
 
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From south Overland Park, Kansas:

A new log this morning during critical hours at 7:00am CDT on 1010 kHz, KSIR in Brush, Colorado. They had to be on their 2-tower directional day power of 25 kW. With excellent ground conductivity, especially to the east, this station covers a wide footprint:

KSIR-AM Radio Station Coverage Map

Bob
 
From south Overland Park, Kansas:

I finally logged XEX on 730 kHz in Mexico City for the first time this morning at 5:45am CDT. I have noticed in the past that in my area, I often receive the strongest signals from Mexico in the hour before local sunrise. Sure enough, after logging XEX, I also logged XEG, XEROK, XEWA and XERF [all previously logged]. XEG is often strongest signal I receive from Mexico.

Bob
Nice catch, Bob.

I've been hearing XEX just about nightly on my current visit to southern California and Arizona. Not particularly strong, but usually alone. I've heard XEX as well as the others you mentioned at my home location at one time or another, although they've all become tougher catches in recent years.
 
Two new catches for me 5/18/2021 around local sunrise. First, WMJR, 1380 Nicholasville, KY (Lexington area). "Relevant Radio" on top of the channel with a fair signal. I presume they were on day power, 5kw non-directional. 361 miles. Radio: C Crane Skywave.

Then WVHF 1140 Kentwood, MI (Grand Rapids area). Also Catholic radio. Good signal, and all over WRVA. 5kw daytimer with a directional pattern favorable to me. 147 miles. Also with the C Crane Skywave.
 
Two new catches for me 5/18/2021 around local sunrise. First, WMJR, 1380 Nicholasville, KY (Lexington area). "Relevant Radio" on top of the channel with a fair signal. I presume they were on day power, 5kw non-directional. 361 miles. Radio: C Crane Skywave.

Then WVHF 1140 Kentwood, MI (Grand Rapids area). Also Catholic radio. Good signal, and all over WRVA. 5kw daytimer with a directional pattern favorable to me. 147 miles. Also with the C Crane Skywave.
Nice catch. I've gotten 6 stations on 1380 but never that one. By a coincidence, I got a new station on 1380 just a couple of hours ago (9 PM Chicago time), namely CKPC, a 25 KW station out of Brampton, Ontario. I'm a little surprised there were still stations that strong in that area that I had never gotten before, but this was my first time hearing CKPC.
 
Nice catch. I've gotten 6 stations on 1380 but never that one. By a coincidence, I got a new station on 1380 just a couple of hours ago (9 PM Chicago time), namely CKPC, a 25 KW station out of Brampton, Ontario. I'm a little surprised there were still stations that strong in that area that I had never gotten before, but this was my first time hearing CKPC.
CKPC is a nice catch. 25kw, but very directional. The day and night nulls both pretty much include the Chicago area. So while DXers around here....myself incuded...have heard it on occasion, CKPC is still relatively rare.

On my biz trips to Canada, I've spent several nights in Brampton, which is about an hour west-southwest of Toronto. CKPC used to be basically adult contemporary with a large dose of news and information. (I found their presentatiion to br somewhat boring, so I didn't listen much). Anyway, that format has apparently been migrated to their FM. and religion is now what's running on AM 1380.
 
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From Overland Park, Kansas:

A new log at 4:00am CDT on 1050 kHz, WLIP in Kenosha, Wisconsin, a 250 watt non-directional signal. The signal was not strong but in the clear enough to log the top of the hour ID. Often at this hour, this frequency is dominated by XEG at my location.

Bob
 
From Overland Park, Kansas:

A new log at 4:00am CDT on 1050 kHz, WLIP in Kenosha, Wisconsin, a 250 watt non-directional signal. The signal was not strong but in the clear enough to log the top of the hour ID. Often at this hour, this frequency is dominated by XEG at my location.

Bob
Nice catch. WLIP is only about 35 miles north of where I am.
 


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