Acceptable registrations in the queue through May 6 at 7:00p 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
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 80 matches
- Sat May 30, 2020 9:16 am
- Forum: Broadcasting - General
- Topic: Best sounding radio station of all time
- Replies: 20
- Views: 5860
Re: Best sounding radio station of all time
From a practical viewpoint, it is easier to achieve "high" r-f bandwidths in transmitters and transmit antenna systems at higher carrier frequencies because the necessary percentage of bandwidth to do it there is reduced.
- Sat May 30, 2020 5:03 am
- Forum: Broadcasting - General
- Topic: Best sounding radio station of all time
- Replies: 20
- Views: 5860
Re: Best sounding radio station of all time
Back in the 1960s I had a McIntosh MR-55A AM/FM mono-only tuner. The AM section had selectable r-f bandwidth that enabled nearly flat audio response out to 9.5 kHz, and a 10 kHz "whistle filter" to remove the audio heterodyne from adjacent-channel carriers. It was possible to make an instant A-B swi...
- Tue May 19, 2020 10:20 am
- Forum: Engineering & DX'ing
- Topic: The Strongest Skywaves In The Straits Area Of Northern Michigan
- Replies: 38
- Views: 5948
Re: The Strongest Skywaves In The Straits Area Of Northern Michigan
Below is a view of the nighttime skywave contours of WOWO and some of their co-channel competitors these days.
- Mon May 18, 2020 4:40 am
- Forum: Metro Detroit/SE Michigan
- Topic: April Radio Ratings
- Replies: 24
- Views: 4928
Re: April Radio Ratings
CBS ... hobbled WBBM-AM's signal by reducing its power and moving it to a diplex with WSCR, several miles further from the center of Chicago. ... As it turns out, the WSCR tower is a taller and "more efficient" radiator than the one WBBM used before they diplexed with WSCR. The 42 kW nighttime grou...
- Wed May 13, 2020 8:32 am
- Forum: Engineering & DX'ing
- Topic: The Strongest Skywaves In The Straits Area Of Northern Michigan
- Replies: 38
- Views: 5948
Re: The Strongest Skywaves In The Straits Area Of Northern Michigan
WYLL should probably also be on the list. But they are 50 kW Night from a second site in Lockport, IL. ... Here is a list of Chicago AM stations showing their nighttime skywave (50%) fields in Mackinaw City, MI. WSCR: 0.73 mV/m WGN: 0.75 " WBBM 0.67 " WLS: 0.72 " WMVP: 1.1 " WYLL: 1.3 " The value s...
- Tue May 12, 2020 3:51 pm
- Forum: Engineering & DX'ing
- Topic: The Strongest Skywaves In The Straits Area Of Northern Michigan
- Replies: 38
- Views: 5948
- Tue May 12, 2020 8:59 am
- Forum: Engineering & DX'ing
- Topic: The Strongest Skywaves In The Straits Area Of Northern Michigan
- Replies: 38
- Views: 5948
Re: The Strongest Skywaves In The Straits Area Of Northern Michigan
Below are plots showing the nighttime relative fields serving Mackinaw City, MI radiated by WJR, WFDF and WWJ, based on FCC data and methodologies:
- Mon May 11, 2020 2:51 pm
- Forum: Engineering & DX'ing
- Topic: The Strongest Skywaves In The Straits Area Of Northern Michigan
- Replies: 38
- Views: 5948
Re: The Strongest Skywaves In The Straits Area Of Northern Michigan
Those are the nighttime skywave fields (50%) for all three stations.
- Mon May 11, 2020 4:33 am
- Forum: Engineering & DX'ing
- Topic: The Strongest Skywaves In The Straits Area Of Northern Michigan
- Replies: 38
- Views: 5948
Re: The Strongest Skywaves In The Straits Area Of Northern Michigan
1. WWJ 950 50000 watts, Directional to the North. 2. WFDF 910 25000 watts, Directional to the North. 3. WJR 760 50000 watts, Nondirectional. ... Here is a comparison of the 50% nighttime skywave fields from those stations in/near Mackinaw City, MI using FCC data and methodology: WWJ 2.1 mV/m WFDF 2...
- Mon May 11, 2020 4:04 am
- Forum: Engineering & DX'ing
- Topic: The Strongest Skywaves In The Straits Area Of Northern Michigan
- Replies: 38
- Views: 5948
Re: The Strongest Skywaves In The Straits Area Of Northern Michigan
... I was trying to find a strong Detroit station that I could hear in the FL Keys, but WJR had a competing signal from Tampa area and the other ones are all directional to the north. :( Yes, there isn't much of a chance for WJR to be heard south of ~Orlando, FL due to the co-channel interference p...
- Wed Feb 26, 2020 7:38 am
- Forum: Engineering & DX'ing
- Topic: "...mysterious voices, music come from house's walls..."
- Replies: 4
- Views: 1298
Re: "...mysterious voices, music come from house's walls..."
Probably this house was not located near the city center of Lockport, IL, which would put it ~3.5 miles from the WYLL nighttime array on its bearing of about 285°. WYLL radiates less than 100 watts toward that sector. WYLL has a nighttime field intensity of about 16 mV/m in the Lockport ZIP, where W...
- Sun Feb 23, 2020 5:01 am
- Forum: Engineering & DX'ing
- Topic: WWJ signal problems? (+ WJR audio distortion)
- Replies: 79
- Views: 14900
Re: WWJ signal problems? (+ WJR audio distortion)
RE: WXYT (AM) is quite weak everywhere south of its array near the I-275/I-75 interchange.
Below are plots showing the effective radiated power of WXYT based on their FCC pattern data.
Below are plots showing the effective radiated power of WXYT based on their FCC pattern data.
- Wed Feb 05, 2020 7:49 am
- Forum: Engineering & DX'ing
- Topic: WWJ signal problems? (+ WJR audio distortion)
- Replies: 79
- Views: 14900
Re: WWJ signal problems? (+ WJR audio distortion)
The accurate measurement of radiated e-m field intensities requires a receive antenna with a known "Antenna Factor" for the physical conditions existing when using it to make the measurement. Below are a few comments about this from the National Institute of Standards and Technology in the U.S. http...
- Sat Feb 01, 2020 12:52 pm
- Forum: Engineering & DX'ing
- Topic: WWJ signal problems? (+ WJR audio distortion)
- Replies: 79
- Views: 14900
Re: WWJ signal problems? (+ WJR audio distortion)
Below is a clip from VSoft showing some of the higher day/night AM broadcast field intensities at locations about 10 miles west of Pontiac, Michigan.
- Sat Feb 01, 2020 10:45 am
- Forum: Engineering & DX'ing
- Topic: WWJ signal problems? (+ WJR audio distortion)
- Replies: 79
- Views: 14900
Re: WWJ signal problems? (+ WJR audio distortion)
Nighttime skip in the Midwest has been abnormal recently. I've noticed that the Class As within 500-600 miles of my location in west central Illinois have been quite noisy — worse than the Class A signals arriving here from the east coast, at the same time.