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Radio 21 (Deutschland) – Wikipedia
Signals of radio emission PSR 1919 + 21 at a frequency of 72.7 MHz... | Download Scientific Diagram
EI7GL....A diary of amateur radio activity: FM radio station on 88.5 MHz in Greenland is heard in Ireland - 21st June 2021
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Radio 21 jetzt auch auf DAB+ - RadioBlog.eu
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2. Measurement campaigns of other amateur HF bands: 21 MHz and 28 MHz. | Download Table
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BBC World Service: 12.095 MHz @ 21:00 UTC : r/shortwave
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Radio 21 erweitert sein Sendegebiet - Thomas bloggedThomas blogged
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EI7GL....A diary of amateur radio activity: FM radio station on 90.7 MHz near Quebec is heard across the Atlantic in Ireland - 21st June 2021
Radio 21 (Deutschland) – Wikipedia
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EI7GL....A diary of amateur radio activity: Opening on the 50 MHz band from Antarctica to Europe - 21st March 2023
