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Radio 1939-02

Radio1939-02.jpg Radio 1936-05ThumbnailsRadio News 1936-03Radio 1936-05ThumbnailsRadio News 1936-03

Photograph of parabolic dish antenna, as used for radio astronomy or microwave communication. "An Amateur's All-Purpose Audio Amplifier," and "Increasing Efficiency of Close-Spaced Arrays."



Source: eBay sellers

Restoration by: magscanner