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Mechanical Television

Corona Discharge in Mechanical Television

In 1928 all mechanical receivers used a flat neon tube for the light source. As a result, the image was dim, and orange in color. This article describes the use of corona discharge to create the image.

One company, the Radiovision company, sold equipment for this technique. At that time,several stations were broadcasting facsimile images ("Radio Pictures") after their regular broadcast completed at night.