The Chicago "Radio Age" announces that Radio Corporation of America, makers of the "Radiotron" valves, will shortly produce another new valve which is said to be something important in its way. J
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https://paperspast.natlib.govt.nz/periodicals/RADREC19271007.2.36
Bibliographic details
Radio Record, Volume I, Issue 12, 7 October 1927, Page 13
Word Count
32Untitled Radio Record, Volume I, Issue 12, 7 October 1927, Page 13
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