radio communications - How do aircraft making HF transmissions avoid stepping on other HF users? - Aviation Stack Exchange
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Radio Frequencies
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![K3MT's "Villard Anti-Jamming" antenna - TSF-radio](https://img.yumpu.com/34567117/1/500x640/k3mts-quotvillard-anti-jammingquot-antenna-tsf-radio.jpg "K3MT's "Villard Anti-Jamming" antenna - TSF-radio")
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