DescriptionRCA 7JP4 Electrostatic Picture Tube Front View (late 1940).jpg
English: The 7JP4 was a popular picture tube in small low cost televisions made in the United States in the late 1940's. This picture tube was used in electrostatic deflection TV sets. The United States was one of the few countries that made and sold electrostatic TV's
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Own work (Original text: Took a picture of my tube collection.)
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