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| TBL - Details |
Part A is sorted by frequency, within the frequency by continents and within the continents by countries in alphabetical order:
1.) Europe
2.) Africa
3.) Asia (3.1. Asian part of CIS, 3.2. Near East, 3.3. Far East, 3.4 Pacific)
4.) America (4.1 North, 4.2. Central, 4.3.South)
Part B is sorted by countries, within the countries by frequency and within the frequencies by output power, using declining order, so the strongest station will be at the top.
An additional part contains the stations having been inactive for a long time and stations which are not to be believed to return to the frequency soon.
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Every experienced DXer will see the advantages - it's easy to find parallel frequencies, to identify retransmitting stations and to check all other stations transmitting from a particular area before propagation condition sets you the limit...
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The frequency range covered by TBL has been expanded to 30 MHz, so all domestic services transmitting between 5.8 to 30 MHz are shown additionally to the tropical band services.
TBL contains information about sunrise and sunset times for every known transmitter site, relating to the middle of the month a certain TBL is ordered.
Beginners in Tropical Band listening can easily get a perspective, at which times the signal path is in the dark and therefore a reception is possible theoretically.
For specialists it will serve as a worthy addition to find out at which times grayline-DX is possible, with a accuracy which could hardly be reached by a mechanic help (DX-Edge): The accuracy is probably never more than two minutes in error for a given location and, of course, there won't be any electric noise in your receiver caused by a computer!
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In the article "Tropical Band Propagation from Asia" by David Clark and Tony Ward, VE3NO, in "Proceedings 1994-95" the significance of the dates mentioned above has been emphasized:
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"Broadcast Engineers have had available to them for some years now a number of path-prediction programs, and the increasing power of personal computers has of course made these readily available to DXers of all stripes. (Sams, 1988) Attempts have been made to apply these to the Tropical Bands with mixed results. We feel that at present mini-MUF and variants bring generally inappropriate and often hidden assumptions to the paths and frequencies of interest here. What DXers need is accurate knowledge of sunrise and sunset times at their own and target locations ..."
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