Filter
Radioteknik
Filter
In this title, the genesis of Morse's invention is covered in detail, starting in 1832, along with the establishment of the first intercontinental telegraph line in the United …
This history of commercial radio networks in the United States provides a wealth of information on broadcasting from the 1920s to the present. It covers the four transcontinental …
During the first fifty years of the twentieth century, ham radio went from being an experiment to virtually an art form. Because of the few government restrictions and the low …
In 1873, Scottish physicist James Clerk Maxwell first advanced the idea that there might be electromagnetic waves that were similar to light waves, a startling concept to the …