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The Emerson-747 portable tube radio receiver has been manufactured since 1953 by Emerson Radio and Phonograph Corp, New York.
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Superheterodyne on 4 radio tubes with a built-in loop antenna.
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The AM range is 540 ... 1600 kHz.
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IF - 455 kHz.
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AGC.
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The sensitivity of the model is 1 mV / m.
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Selectivity is about 30 dB.
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Maximum output power 50 mW.
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The range of reproduced sound frequencies is 250 ... 4000 Hz.
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Powered by two batteries, one 1.5 volt and one 45 volt.
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Dimensions of the model are 156x89x35 mm.
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Weight with batteries 420 grams.
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