![Amazon.com: AM FM Portable Radio, Battery Operated or AC Powered Retro Portable Radios with Best Reception, Vintage Clock Radio with Dual Alarms, Plug in Wall Transistor Radio, Shortwave AM/FM Radios for Home : Amazon.com: AM FM Portable Radio, Battery Operated or AC Powered Retro Portable Radios with Best Reception, Vintage Clock Radio with Dual Alarms, Plug in Wall Transistor Radio, Shortwave AM/FM Radios for Home :](https://m.media-amazon.com/images/I/A1zgam1rpTL._CR3,0,1914,1080_SR342,193__BG0,0,0__QL65_.png)
Amazon.com: AM FM Portable Radio, Battery Operated or AC Powered Retro Portable Radios with Best Reception, Vintage Clock Radio with Dual Alarms, Plug in Wall Transistor Radio, Shortwave AM/FM Radios for Home :
![A Centennial Celebration of Marconi & RCA Wireless Radio in West Marin, 1914-2014 - Point Reyes National Seashore (U.S. National Park Service) A Centennial Celebration of Marconi & RCA Wireless Radio in West Marin, 1914-2014 - Point Reyes National Seashore (U.S. National Park Service)](https://www.nps.gov/pore/planyourvisit/images/pic_marconi100_marshall_rca_morse_operators_1923_285x226.jpg?maxwidth=650&autorotate=false)
A Centennial Celebration of Marconi & RCA Wireless Radio in West Marin, 1914-2014 - Point Reyes National Seashore (U.S. National Park Service)
![Edwin Howard Armstrong (December 18, 1890 – January 31, 1954) was an American electrical engineer and inventor. He has been called 'the most prolific and influential inventor in radio history'. He invented Edwin Howard Armstrong (December 18, 1890 – January 31, 1954) was an American electrical engineer and inventor. He has been called 'the most prolific and influential inventor in radio history'. He invented](https://c8.alamy.com/comp/2B02PKK/edwin-howard-armstrong-december-18-1890-january-31-1954-was-an-american-electrical-engineer-and-inventor-he-has-been-called-the-most-prolific-and-influential-inventor-in-radio-history-he-invented-the-regenerative-circuit-while-he-was-an-undergraduate-and-patented-it-in-1914-followed-by-the-super-regenerative-circuit-in-1922-and-the-superheterodyne-receiver-in-1918-armstrong-was-also-the-inventor-of-modern-frequency-modulation-fm-radio-transmission-armstrong-was-born-in-new-york-city-new-york-in-1890-he-studied-at-columbia-university-he-later-became-a-professor-at-columbia-2B02PKK.jpg)
Edwin Howard Armstrong (December 18, 1890 – January 31, 1954) was an American electrical engineer and inventor. He has been called 'the most prolific and influential inventor in radio history'. He invented
![A homemade Audion radio receiver constructed by an amateur radio hobbyist 1914. The Audion (triode), the first amplifying vacuum tube, was invented by Lee De Forest in 1907 but was not widely A homemade Audion radio receiver constructed by an amateur radio hobbyist 1914. The Audion (triode), the first amplifying vacuum tube, was invented by Lee De Forest in 1907 but was not widely](https://c8.alamy.com/comp/2DYX1KH/a-homemade-audion-radio-receiver-constructed-by-an-amateur-radio-hobbyist-1914-the-audion-triode-the-first-amplifying-vacuum-tube-was-invented-by-lee-de-forest-in-1907-but-was-not-widely-used-until-its-amplifying-ability-was-recognized-around-1913-so-this-is-one-of-the-earliest-vacuum-tube-radios-2DYX1KH.jpg)
A homemade Audion radio receiver constructed by an amateur radio hobbyist 1914. The Audion (triode), the first amplifying vacuum tube, was invented by Lee De Forest in 1907 but was not widely
![Radio receiver components, 1914 Wall Art, Canvas Prints, Framed Prints, Wall Peels | Great Big Canvas Radio receiver components, 1914 Wall Art, Canvas Prints, Framed Prints, Wall Peels | Great Big Canvas](https://static.greatbigcanvas.com/images/singlecanvas_thick_none/science-photo-library/radio-receiver-components-1914,1411132.jpg)