frequency within a radius of 100 km. Radiovision-PTT, the first French television channel, had just been born. Radio-PTT Vision began operations on 26 April...

April 12–28, 1940 Electronic television 441 lines / 21 to 42 frame/s. Radiovision PTT (1935) later Paris Television (1943) then RTF (1946) (Eiffel Tower)...

30 lines, developed in the Compagnie des Compteurs laboratory. This "radiovision" experience is the first from a radio transmitter (located 2 kilometers...