https://makingcircuits.com/blog/very-low-frequency-vlf-converter-circuit/
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Very low frequency vlf converter circuit
https://makingcircuits.com/blog/very-low-frequency-vlf-converter-circuit/
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Esquema de um conversor VLF/LF https://www.qsl.net/df3lp/projects/lfconv/index.html
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https://makingcircuits.com/blog/very-low-frequency-vlf-converter-circuit/
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Em 30 de agosto de 2018 foi autorizado para radioamadores Brasileiros as bandas de 630 metros e 2200 metros. Poder...
