I changed the path to another source for the graphic, so maybe that will work. Thanks for the tip.

Below is a graphic comparing the current operation of WJR to their proposal for 500 kW transmitter power using a directional antenna to limit their radiation toward Toronto to their current, 50 kW licensed value — which the FCC did not grant. (The parameters of the 500 kW array below are not necessa...

Given the high number of "50 kW" AM stations near Detroit that use directional arrays with much greater ERPs than 50 kW in some compass directions... Below is a graphic showing the fields at 1 km for transmitter powers of 0 - 500 kW when radiated by unloaded, base-driven, vertical monopoles having ...

See post below...

... I don't think the solid state radios were quite as good. Then around 1970, they went to the windshield antennas, which were a disaster as far as sensitivity. It took few years for the Delco GM engineers (and much later clients of mine) to figure out how to optimize this. For a more recent examp...

Turkeytop wrote: ↑

Wed Nov 25, 2020 7:53 pm

WSB has rebranded and now calls itself 95.5 WSB.

Not only that, it looks like they are now using a frequency 94.75 MHz higher in the spectrum than they had been licensed for.

innate-in-you wrote: ↑

Wed Nov 25, 2020 9:59 am

Pay attention to the fine print distance scales that state that the WJR map should be about twice the size of the WSB! ...

Yes, which difference in scale was stated in the third "bullet" of the list at the top of the graphic.

The graphic below is pretty much self-explanatory, and shows maybe some surprising results for the relative coverage areas of those two almost identical AM broadcast station facilities, both day and night. The maps show the 1 mV/m and 0.1 mV/m contours for both stations. https://i.postimg.cc/Mp2GcMt...

As I recall, WJR was in the vicinity of 50 uV/m near the Straits when I measured it with an FI meter. ... That is in fairly good agreement with the graphic below, which shows the daytime 1 mV/m and 0.1 mV/m calculated field contours of WJR, based on recent understandings of soil conductivities for ...

...- WJR has been severely overmodulated since last winter. ... Is there accurate, reliable, measured evidence that they are truly overmodulating their AM carrier — as would be true if their negative-going program audio modulation peaks produced carrier-clipping "splatter" radiated well beyond the ...

... In any event, the signals of Northern Michigan AMs has always been much less than similar facilities in low lying areas of SE Michigan. For example, 5 kw WWJ vs. WHAK ... Do such conclusions consider antenna system "efficiency?" For example, WWJ using a 1/2-wave radiator would radiate about twi...

Apparently such studies show soil conductivity values in northern lower Michigan to be much less than those shown there on the FCC M3 map. It is puzzling then how WJR, Detroit has produced a measured , daytime groundwave field intensity near the Straits of Michigan that is more consistent with the 8...

See my post below...

... Now I can barely hear WXYT , at night, out here with 50 kW and the deep null to the northwest ! Below is a plot showing about what to expect for the nighttime GW field of WXYT in/near Commerce Twsp, MI — something like 8 mV/m . The slope of their licensed nighttime pattern is getting steep towa...

This is the current Theoretical pattern of WUFL 1030. The maximum is at about 250 degrees true. https://www.fccdata.org/am_pattern.php?antid=99836 Below are plots of the 1.0 and 0.1 mV/m groundwave field intensity contours of WUFL when using that DA: https://i.postimg.cc/xCVHM1qy/WUFM-Daytime-GW-Cv...