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Title: Adey 4-valve portable radio with 3 self-coupling valves, 1 p [Go to resource]
Description: Adey 4-valve portable radio with 3 self-coupling valves, 1 pentode valve and advertising literature, c. 1934 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1983-798 Go to resource More Like this...
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