W6SI NCDXF/IARU Beacon Monitor Home Page |
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<Ad Space Available Here!!> | The NCDXF, in cooperation with the IARU, constructed and operates a worldwide network of high-frequency radio beacons on 14.100, 18.110, 21.150, 24.930, and 28.200 megaHertz. These beacons help both amateur and commercial high-frequency radio users assess the current condition of the ionosphere. The entire system is designed, built and operated by volunteers at no cost except for the actual price of hardware components, shipping costs, and so on. |
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Beacon Status![]() |
Beacon Frequncies:
Whatever you do, Do Not Transmit on these Frequencies, PLEASE! |
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Each beacon transmits every three minutes, day and night. A transmission consists of the callsign of the beacon sent at 22 words per minute followed by four one-second bursts. The callsign and the first burst are sent at 100 watts. The remaining bursts are sent at 10 watts, 1 watt and 100 milliwatts. | |||||
If you would like to monitor beacons yourself, go check the available software at NCDXF International Beacon site, "Tools for Listners" page. |
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The image on the right shows how each chart looks like and what they represent. Received beacon on a given band, given time are shown in blue, green, to yellow (I never saw red or white) dots. Where are those beacons located? The monitor station (which is also my base station) consists of: Location: So. California 33° 37' N, 117° 38' W, DM-13 Color legend for the chart: |
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Above is a reflection of my thought and only mine. But if you have any questions, feedback and/or suggestions, please send me an e-mail. I might reply on this page (sorry, no guarantee) |
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Copyright 2014-2025 Tak Asami / W6Si & OSO Technology |