Public domain
Colored radio recorder is latest in radio receivers. E.B. Judson of the Bureau of Standards and his two colored radio recorder, automatically recording signals in two colors, red and black. This automatic receiver is capable of receiving signals from American or European stations
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Subjects
Credit lineColored radio recorder is latest in radio receivers. E.B. Judson of the Bureau of Standards and his two colored radio recorder, automatically recording signals in two colors, red and black. This autom. 1928-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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