The Brazilian Post issued on January 21st, 2011 a stamp to commemorate the 150th anniversary of the birth of Father Landell de Moura, the pioneer of radio broadcasting in Brazil. Roberto Landell de Moura was the first person to broadcast the human voice over a distance without using wires. This was the forerunner of what was then called radiotelephony, which is nothing more than what we nowadays know as radio. He was born on January 21, 1861, in Porto Alegre, and was ordained as a priest in Rome in 1886. Besides theology, he also studied physics and chemistry at the Gregorian University, in Rome, Italy, where he started to develop the theory that formed the basis for his different inventions.Landell carried out his first experiments at the end of the 19th century. At the same time, whilst Landell’s equipment was broadcasting voices, Guglielmo Marconi, the famous Italian inventor was only transmitting signals in Morse code (groups of dots and dashes). Father Landell died anonymously in his home town on 30 June 1928.
The stamp portrays Father Landell de Moura speaking into a “wave transmitting” microphone, one of the devices he invented. In the background, there is a reproduction of the United States patent document of 1904, and a design of the device. In the bottom left hand corner there is an Amplitude Modulated (AM) radio wave, for transmitting the sound of the human voice over long distances without using wires.