Acceptable registrations in the queue through October 17 at 11:00a ET have now been activated. Enjoy! -M.W.

Terms of Use have been amended effective October 6, 2019. Make sure you are aware of the new rules! Please visit this thread for details: https://www.mibuzzboard.com/phpBB3/view ... 16&t=48619

Search found 1138 matches

by CK-722
Sat Oct 24, 2020 1:02 am
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

Found this looking for other classic Coverage Maps.

Image
by CK-722
Sat Oct 24, 2020 12:49 am
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

WOWO Daytime Coverage Map.

Image
by CK-722
Fri Oct 23, 2020 5:49 pm
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

I saw a daytime GW contour map for WGN at that link; is there also a nighttime skywave map there (that I missed)? Not that I could find. If we have maps like that in our possession, we should scan them, give ourselves credit like the ARSA site for station music playlist surveys does, and share the ...
by CK-722
Fri Oct 23, 2020 5:13 pm
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

WGN 50% Skywave using new skywave model. The predicted 0.5 mV/m 50% Skywave does not go out as far as the old model, where it was assumed to go out about 750 miles. It's also based on a geomagnetic midpoint latitude, which makes a nondirectional signal go better to the South than to the North. https...
by CK-722
Fri Oct 23, 2020 10:31 am
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

To test the hypothesis that Lake Michigan conductivity exceeds M-3, some engineers with trusty calibrated Potomac AM BC field strength meters, who take care of Grand Traverse Region stations, should go out to Lake Michigan near the Mason Manistee County line and actually measure it where the WGN Map...
by CK-722
Fri Oct 23, 2020 10:25 am
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

Here is a very similar coverage map for WGN.

Image
by CK-722
Fri Oct 23, 2020 8:40 am
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

Haven't seen this WCFL Skywave Map before, which came up in my search.

Image
by CK-722
Fri Oct 23, 2020 8:31 am
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

Here's a similar map to the Radioguide map, which was basically monochrome.


Image
by CK-722
Fri Oct 23, 2020 8:25 am
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

One of Art Vuolo's very first WJR Radioguides, distributed at Big Boy Restaurants statewide circa 1975, had a WJR Coverage Map from a few years later. It is similar to the one Rich posted, but doesn't have the bulge toward the Straits Area with Grayling in the wrong place. I'll see if I can find it ...
by CK-722
Thu Oct 22, 2020 4:47 pm
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

There are many people who believe that the Great Lakes have higher conductivity than M-3 reports, 8 mS/m. Even the Canadian side reports 10 mS/m for their side. So you might get a signal closer to 0.5 mV/m. But not on the sand North and West of Clare.
by CK-722
Thu Oct 22, 2020 1:44 pm
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

In Genesee County, WKMF 1470 had the Tigers until the mid 1960s. By 1968, you had to have a better transistor radio to hear WJR in Factories and Schools, when they had the World Series. WSGW 790 had the Tigers, getting into the Tri Cities well. Rich may remember that WSGW has huqe lobes toward Sagin...
by CK-722
Thu Oct 22, 2020 12:57 pm
Forum: Engineering & DX'ing
Topic: AM Daytime And CH NW Straits Area Of Michigan
Replies: 35
Views: 811

Re: AM Daytime And CH NW Straits Area Of Michigan

:shock: https://radio-locator.com/pats/WJR_AM_LU.gif Notice that the above doesn't match maps based on M-3. toward the Straits. But if you had a good TRF tuned AM antenna and/or simple preamp, you could hear WJR easily in the Daytime in Cheboygan County. Even today in an electrically quiet area. I s...
by CK-722
Thu Oct 22, 2020 2:18 am
Forum: Neighboring States/Ontario
Topic: WPR Pulls Plug on HD Radio
Replies: 5
Views: 292

Re: WPR Pulls Plug on HD Radio

AM Stereo and even FM SCA subchannels resulted in far less problems by comparison. AM Stereo sounded better, regardless of system. I think the FCC has been bowing to executives and investors on this for way too long. Stockholders at GM, Chrysler, Kmart/Sears, JCPenney, etc. suffered much greater los...
by CK-722
Thu Oct 22, 2020 1:29 am
Forum: Engineering & DX'ing
Topic: Distant stations on local AMs
Replies: 5
Views: 202

Re: Distant stations on local AMs

For whatever reason, CJOB has been reported using their Day pattern regularly at Night. Can't say if this is the case with CJOB, but it is reported that some Canadian station operators are so angry at IBOC sideband interference from US stations that the Canadian authorities look the other way when t...