🌐EnglishEnglishDeutschEspañolFrançaisPortuguêsSvenskaفارسیEntityQ1753030· pop 8· linked from 22 articlesMaximum usable frequencyhighest radio frequency that can be used for skywave radio transmissionAvailable in 8 languagesEspañolFrançaisDeutschPortuguêsHungarianSvenskaفارسیvia Wikidata sitelinks · CC0ConnectionstimeEntityradioEntityCategoriesRadio frequency propagation