Ƙananan masu son sa'a waɗanda suka sami izini na musamman don sadarwa na gwaji a tsawon mita 150 sun kammala ɗaruruwan lambobin sadarwa masu nisa a mita 100 (3 MHz) a cikin 1923 ciki har da lambobin sadarwa na farko na transatlantic biyu. Zuwa 1924 ƙarin ƙarin masu son masu lasisi na musamman sun kasance suna yin lambobin sadarwa na transoceanic a nesa na kilomita 6,000 (9,600 km) da ƙari. A ranar 21 ga Satumba, 1924 da dama masu son California sun kammala lambobin sadarwa na biyu tare da mai son mai son a watan Oktoba. A ranar 19 ga Oktoba a New Zealand da New Zealand. Tambaya ta uku: Ta yaya aka samar da lambobin sadarwa na tsawon mita 100 (MHz) a tsawon mita 100 (MHz) a shekara ta 1923.
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