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Speg's 2011 Broadcast FM DX Log
- Capitalized items are what were heard on the air to identify the station. Distances are in miles.
- Red call letters indicate new stations. Tan call letters indicate new stations this year.
- Explanation about estimation of critical frequency and electron density is at bottom of page.
- Unidentified or unconfirmed list
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2011 Es
Days: 4
Es Contacts: 24
Different Stations: 24
New Stations: 10
States: 4 (CA FL NV PA)
Canadian Provinces: 0
Mexican States: 7 (BC CH CO DG MI SI YU) +DF
New Mexican States: 3 (CH DG SI)
Countries: 2 (US MX)
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June 29, 2011 (Es) from Norman OK
Est. Critical Freq: 18.88 MHz. Est. Electron Density: 4.42 x 1012 /m3 (based on kzxy)
FREQ CALL Time Dist ST City Format Other information
94.1 kmxb 228 pm 986 nv henderson HOT AC MIX 94.1. LOCAL VEGAS AREA ADS
94.3 kduc 217 pm 1106 ca barstow TOP 40-RHY THE DUCK
102.3 kzxy-fm 211 pm 1119 ca apple valley HOT AC Y-102
June 22, 2011 (Es) from Norman OK
Est. Critical Freq: 25.91 MHz. Est. Electron Density: 8.32 x 1012 /m3 (based on xhclo)
FREQ CALL Time Dist ST City Format Other information
88.5 xedi 1258 pm 681 mx CH CHIHUAHUA SPAN-TOP 40
89.7 xeope 100 pm 990 mx si mazatlan SPAN-TOP 40 EXA FM
92.9 wikx 1252 pm 1065 fl charlotte harbor COUNTRY KIX 92.9
92.9 XHYUC 129 pm 1093 mx yu merida SPANISH RDS: XHYUC
93.1 kplv 535 pm 1014 nv las vegas RHYTH AC THE PARTY
93.7 wtlt 1254 pm 1101 FL sanibel island SOFT AC LITE 93.7
94.1 wqkx 156 pm 608 pa sunbury top 40 LOCAL ADS
94.3 KOKO-fm 356 pm 1267 ca kerman RHYTH OLD
95.5 xhmp 103 pm 758 mx co TORREON SPANISH
95.7 xhck 122 pm 887 mx dg durango SPANISH RDS: maspopfm
99.5 wail 110 pm 1197 fl key west CLSC ROCK SUN 103.1 AND 99.5
99.5 xhsbt 152 pm 692 mx CH san buenaventura SPANISH
99.9 XHCTC 111 pm 726 mx ch cd. cuauhtemoc SPANISH RDS: XHCTC
101.3 XHMSL 114 pm 946 mx si los mochis SPANISH RDS: XHMSL
103.3 xenw 1248 pm 965 mx SI CULIACAN SPANISH RDS: MAXIMA 103.3 FM DESDE DE CULIACAN SINALOA
106.9 xhada 116 pm 1126 mx bc ENSENADA SPANISH
107.1 xhclo 1251 pm 622 mx co monclova SPANISH LA CALIENTE
June 10, 2011 (Es) from Norman OK
Est. Critical Freq: 17.66 MHz. Est. Electron Density: 3.87 x 1012 /m3 (based on xhsh)
FREQ CALL Time Dist ST City Format Other information
91.5 xhmrl 1124 pm 1100 mx mi Morelia SPANISH WEBCAST MATCH
93.9 xhmo 1122 pm 1100 mx mi Morelia SPANISH WEBCAST MATCH
95.3 xhsh 1058 pm 1100 mx df Ciudad de Mexico SPANISH RDS: AMOR. WEBCAST MATCH
June 5, 2011 (Es) from Norman OK
Est. Critical Freq: 17.75 MHz. Est. Electron Density: 3.91 x 1012 /m3
FREQ CALL Time Dist ST City Format Other information
92.9 wmfq 525 pm 991 FL Ocala
The critical frequency and electron density of the sporadic-E layer are estimated by
calculating the minimum values to allow the reflection of the radio waves from the station
requiring the highest critical frequency of the broadcast frequencies and distances
observed. The following assumptions are used: (1) The height of the Es layer is 105 km,
and (2) constant (no tilt), and that (3) the signal is affected only by the Es layer and
not the temperature profile or weather in the elevations below the Es layer. Given
otherwise similar parameters, the signal needing the highest critical frequency and
electron density of the Es layer are those of shorter reflection distances or higher
broadcast frequencies. The values listed were derived mathematically, but the 105 km
height was used to compare values to the PROPLAB-PRO radio propagation computer program
(which agreed reasonably well).