Saludos steemians poco a poco les hablaré de temas que pasan desapercibidos pero que seguro les llamará la atención..
¿radiotransmisores?
En 1887, el aleman Heinrich Hertz vio que no era indispensable utilizar alambres pra transmitir señales eléctricas, pues había descubierto las ondas de radio electromagneticas. En 1896, Guglielmo Marconi, italiano, fabrico los primeros radio transmisores y receptores practicos. En un principio, la radio solo enviaría sonidos simples, como lo hacia el telégrafo.
https://ipfs.busy.org/ipfs/QmY2oyYYtMWc8TUK8CRfQmN31WU54SXbajqidZVm9Bxp6s
Fuente
Sin embargo en 1904 Jhon Fleming, ingeniero británico, invento los tubos o válvulas electrónicas que hicieron posible la amplificación de las señales y así la voz humana y otros sonidos podían transmitirse por radio.
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