broadcast, radio, first amplifier valve, right: Telefunken Triode, Type EVN 94, Germany, circa 1914, 1910s, 10s, 20th century, historic, historical, invention, inventions, clipping, cut out, cut-out, cut-outs, Additional-Rights-Clearences-Not Available

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Photo credit: © INTERFOTO / History / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 10s, 1910s, 20th, amplifier, broadcast, century, clipping, cut, cut-, cut-outs, evn, historic, historical, invention, inventions, radio, telefunken, triode, type, valve