venerdì 10 aprile 2020

The end of the tropical bands. Anker Petersen's report

Tropical Bands Survey first edition in 1973
Trends in tropical bands broadcasting 2020
by Anker Petersen

Since the Danish Short Wave Club International published the first annual Tropical Bands Survey in 1973, I have registered which stations are active, based upon loggings from our members and other DX-ers around the world. Here is an updated status where Clandestine and Pirate stations are not included.

Active domestic transmitters on 2200 – 5800 kHz

Region         year   1973     1985    1997    2009    2020    

Central Africa         102        76      40      18        3
Southern Africa       57          39      33      20        5
Middle East             9       4        1        0        0

Indian Subcontinent      62      45      45      29      11
South East Asia            40      29      21        4        1
Indonesia                      171    105      65      13      2

China, Taiwan, Mongolia    119    110      75      32      15
CIS (former USSR)             61      59      47        7        4
Far East                               38      28      28        9        7

Papua New Guinea              17      20      20      15        2
Australia and other Pacific  10        4      13        8        6

Central America, Mexico    21      23      24        5        1
Caribbean                            29        3        3        2        3  
Northwestern South America  98      41      19        3        1

Ecuador      47      33      22        5        0
Peru            78      69      78      28        8
Bolivia        35      42      25      14        1

Brazil    107      87      67      35      13
Southern South America        5        2        1        0        1

Total             1106    819    627    247      84

During the past year the previous trend, that Tropical stations slowly disappear, continued throughout the world with a loss of about 10 stations. A year ago the Total was 92. The reason is, that other media get higher priority, than keeping elderly Shortwave transmitters alive.

Here are some of the stations on the Tropical Bands, which have closed down during year 2019:

kHz        kW       Station                Country            Last log
3200        50        TWR, Mpangela Ranch    Eswatini                             JUL19       
3265        50        WBCQ, Monticello, Maine               USA                 AUG19
3345        10        RRI Ternate, Pro. Maluku Utara      Indonesia           MAY19
4760          8        AIR, Port Blair, Andaman                 India                 FEB19
4775         50       TWR, Mpangela Ranch                    Eswatini            NOV19
4835        0,1       OZY R, Mount Razorback, NSW      Australia           JAN19
4845        10        R Cultura, Manaus, AM                    Brazil                 MAR19
4895        50        AIR, Kurseong, Paschim Banga       India                   MAR19
4965          5        R Alvorada, Parintins, AM                 Brazil               FEB19
5005        15        R Nepal, Khumaltar                           Nepal                FEB19
5580       0,25      R San José, San José de Chiquitos Bolivia                 FEB19