As I did there, I here include a table of the twenty fixed-frequency stations most often posted by the RBN, this time extending the period covered to the period between the inception of the RBN (in 2009) to the end of 2017.
|Position||Station||Frequency (kHz)||Number of Posts||Earliest Post||Latest Post|
- Frequencies are rounded to the nearest kHz;
- The first and fourth positions are occupied by what is really the same station, which appears to transmit on 7026.5 kHz;
- Positions 5 and 12 appear to be occupied by a single station, using alternative versions of a single callsign;
- I am unsure how the U.S. stations in the list can be legal, since the FCC's regulations appear to limit [unattended] HF beacons to a portion of 10m;
- FCC regulations also appear to disallow the use of the "/B" indicator as used by station number 5, as the B series is allocated to China.
- It is my memory that the original HF beacons were all located on 28 MHz, so that listeners could be made aware of an opening. It is noticeable that not a single one of the stations on the list above is on 10m: the vast majority are on bands that can reasonably be expected to support some kind of non-local propagation at almost all times (which is probably the very reason that they are posted by the RBN so often -- but one does wonder what the putative purpose of such a beacon is);
- Of the twenty stations in the list, all but one were still active as of (or close to) the end of 2017.