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File:Esquema eletrico transmissor ondas.jpg

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Português: Esquema Elétrico Funcional do Transmissor de Ondas - Aparelho patenteado no United States Patent Office, em 11 de Outubro de 1904
English: Drawing from U.S patent 771,917, a Spark gap transmitter that transmitted human speech, invented by Brazilian priest Roberto Landell de Moura. It was also patented in Brazil March 9, 1901. The first recognised AM {amplitude modulation) radio transmission, by Reginald Fessendon in the US, was on December 23, 1900, so de Moura was one of the first inventors of AM radio, and may have preceded Fessendon. His invention was ignored by the Brazilian government and forgotten.
Date 11-10-1904
Source Pe. Roberto w:Landell de Moura, falecido em 1928 - Patente n 771.917 de 11 de Outubro de 1904
Author Pe. Roberto Landell de Moura, falecido em 1928
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(Reusing this file)		 Estes esquemas já são de dominio público, produzidos em 1904
Other versions Não há outras versões

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