Beacon Reception

Legend Home News & Propagation Contact Us What parts of the world can be received via HF radio right now in Dunfermline?


Beacon Monitor unavailable while building works being carried out at site.


One of our members has installed an HF radio receiver which is controlled by a computer which itself is slaved to a highly accurate atomic clock. The whole package is interfaced to the internet.

There is a chain of beacon transmitters in all continents of the world and our monitoring station is constantly switching between them and switching frequency bands too.

Receiver audio is fed into a sound card and Digital Signal Processing software calculates the strength of the received signal.  The results are shown to you here in real time.

Below you can see reception of the IARU/NCDXF International Beacon Project beacons today and the last couple of days.

The antenna is a 1m broadband active magnetic loop located just above ground level and in the clear some 20m from the main station HF transmitting antenna. Electronic design is based on that given during the  Four Days In May Symposium at the 1999 Dayton Hamvention by George Dobbs, G3RJV.  Currently monitoring 14.100 MHz, 18.110 MHz, 21.150 MHz, 24.930MHz and 28.200 MHz.

World map showing location of beacons. Check tables at foot of page to see which can be heard right now.

Each beacon transmits every three minutes, day and night. A transmission consists of the callsign of the beacon sent in morse code at 22 words per minute followed by four one-second dashes. The callsign and the first dash are sent at 100 watts output power. The remaining dashes are sent at 10 watts, 1 watt and 100 milliwatts. Radio Amateurs in the UK are licensed to transmit with a power of up to 400 watts and some have special permits allowing significantly more.

This is the only UK based NCDXF beacon monitor available. 
  If you find it useful or have any questions why not drop Bernie a line at