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KXOK VS KDWB 1960'S

CHYR was on 710 days, and as CHIR on 730 nights with 250 watts, and later 500 watts. Later, it became CHYR-7. Eventually, they got authorization to operate with 1000 watts minimum efficiency on 710 at night. It was actually 700 watts as I recall, but the antenna RMS horizontal gain brought it above the minimum efficiency for 1000 watts. It's still in the Region II database I think.

Anyway, you would have to have been quite a ways away from Roselle to hear it with WGN 720 on the air.
 
Schroedingers Cat said:
CHYR was on 710 days, and as CHIR on 730 nights with 250 watts, and later 500 watts. Later, it became CHYR-7. Eventually, they got authorization to operate with 1000 watts minimum efficiency on 710 at night. It was actually 700 watts as I recall, but the antenna RMS horizontal gain brought it above the minimum efficiency for 1000 watts. It's still in the Region II database I think.

Anyway, you would have to have been quite a ways away from Roselle to hear it with WGN 720 on the air.
Click to expand...

Around Chicago at night it's always been WOR for me.
 
Scott Fybush said:
If the data reported to the FCC is accurate (and that's not always a given with Canadian stations), CFCO's towers aren't especially high - four of them are 76 degrees and a fifth is 85 degrees, just short of a quarter-wavelength.

But that's hardly unusual for a station at 630 on the dial, where a full wavelength is about 475 meters. A quarter-wave tower on 630 would be just under 400 feet tall.
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Thanks Scott....It's a little hard to tell from the distance from the freeway, and perhaps the flat, unobstructed terrain makes the towers seem more impressive than they actually are. Although 300-400 feet still isn't exactly tiny. And still considerably taller than most a.m. towers.

I did try 630 this morning around 10am CST on a fairly decent car radio. Far northwest suburban Chicago. All I got was noise from WTMJ. No trace of CFCO, KJSL or anything else. Again, I suspect I'm too far west and don't have a good enough radio.

As for CHYR, I've heard it here, but I think it was right around sunrise on day power (710). Agree with Radioman that WOR is normally what you pull out from under WGN around in these parts, although I've heard Kansas City (as WHB) a few times and even KEEL on occasion last year when they were doing work on their antenna system.
 
CFCO puts a very nice signal into Toledo daytime. At night, no trace of it, at least that I can remember. I am guessing WTMJ's IBOC would put quite a crimp into that signal in western Michigan, which isn't far at all from Milwaukee as the crow flies.
 
CFCO changed day patterns around 1985, and again in 1999. The first time, I think the night stayed the same. There was a north south oriented squashed paralellogram, and I think one more tower for a dogleg three tower using two of the day towers at night. Then in 1999, they used newfangled software to design patterns using five towers they already had, and modified the day pattern and night pattern to use all five towers but with radically different patterns. The daytime status of the KDWB (legacy calls) station and the moving of the Winnipeg station to FM under domestic Canadian rules allowed the maximum in that direction and 6 kW night.
 
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