MR. IVAN H. O'MEARA. under lock and key, and had to send to America for catalogues, from which he and others made the coils and condensers from sheet zine. Typewriter roller knobs came in handy. Crystals for detectors were scarce, and experiments were carried out with various minerals. He confiscated several of the best
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https://paperspast.natlib.govt.nz/periodicals/RADREC19300912.2.4.1
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Radio Record, Volume IV, Issue 9, 12 September 1930, Page 1
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54MR. IVAN H. O'MEARA. under lock and key, and had to send to America for catalogues, from which he and others made the coils and condensers from sheet zine. Typewriter roller knobs came in handy. Crystals for detectors were scarce, and experiments were carried out with various minerals. He confiscated several of the best Radio Record, Volume IV, Issue 9, 12 September 1930, Page 1
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