Теория: радиоволны, модуляция и спектр.
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![☀ Как добиться большой дальности? Вводный экспресс-курс в теорию антенн и радиосвязь. [FPV Система]](https://sun9-71.userapi.com/c857324/v857324356/28cb3/1i7dS-v0h9Y.jpg)
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