A transformer coupled audio stage. The batteries are, from the left, "C," "A," and "B."
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https://paperspast.natlib.govt.nz/periodicals/RADREC19310925.2.45.6
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Radio Record, Volume V, Issue 11, 25 September 1931, Page 17
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15A transformer coupled audio stage. The batteries are, from the left, "C," "A," and "B." Radio Record, Volume V, Issue 11, 25 September 1931, Page 17
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