An X-ray of Historic Audion vacuum tube

An X-ray of Historic Audion vacuum tube

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Caption: An X-ray of Historic Audion vacuum tube. This tube made in the 1920's was the first circuit used to amplify radio and television signals. This tube proved critical for the development of television. The Audion vacuum tube was invented in 1906 by Lee de Forest.

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Keywords: audion, audion vacuum tube, device, electronic, electronics, radiograph, technology equipment, thermionic valve, tube, vacuum, vacuum tube, x ray, x-ray, xray

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