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amr mohamed
 
 
amr mohamed


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PostSubject: Valves History    Valves History I_icon_minitimeMon 14 Mar 2011, 9:43 pm

Valves History

The first invention of the electronic valve
Vacuum tube was in 1904 by inventor John Fleming John Fleming as he seeks
To improve the performance of the radio transmission
Discovered that if he had a vacuum tube Baktabin one hot and one cold, it
Possible to detect radio waves. In 1906 in Vienna, said Robert von built
Shoulder on the issue of signs, telephone pole, III and found that it would make references
Vulnerable stronger and much higher
.
Valves History John_f10


Valves History Radio_10

Image of the first valve radio in history

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