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Radioamatori e calamità
radiondistics
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Heinrich Hertz radio waves experiment - The discovery of radio waves
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The radio as we know it today Reginald Fessenden's amplitude modulation breakthrough
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Friuli, 6 Maggio 1976, traffico servizio emergenza espletato dai radioamatori
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Sistemi radianti "auto-antagonisti". Trasduttori radio-elettrici. Destructive wave interference
Shared 16 years ago
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