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Triodo TM
Triodo de vácuo francês de 1915
The TM (from French: Telegraphie Militaire, also marketed as TM Fotos and TM Metal) was a triode vacuum tube for amplification and demodulation of radio signals, manufactured in France from November 1915 to around 1935. The TM, developed for the French Army, became the standard small-signal radio tube of the Allies of World War I, and the first truly mass-produced vacuum tube.
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The TM (from French: Telegraphie Militaire, also marketed as TM Fotos and TM Metal) was a triode vacuum tube for amplification and demodulation of radio signals, manufactured in France from November 1915 to around 1935. The TM, developed for the French Army, became the standard small-signal radio tube of the Allies of World War I, and the first truly mass-produced vacuum tube. Wartime production in France is estimated at no less than 1.1 million units. Copies and derivatives of the TM were mass-produced in the United Kingdom as Type R, in the Netherlands as Type E, in the United States and in Soviet Russia as Р-5 and П-7.
Texto: Wikipédia em inglês, CC BY-SA 4.0. · Imagem: Photo d'un inconnue, anonyme. Unknown (Public domain) ·
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