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The Channel Master 6503 portable radio has been produced since 1959 by two companies, the Japanese Sony and the American Channel Master.
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Superheterodyne on 5 transistors.
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AM range 540 ... 1600 kHz.
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IF 455 kHz.
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Battery powered 9 volts.
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Due to the small number of transistors, the receiver had a low sensitivity (~ 5 mV / m) and sufficient volume in a small radius from the radio station.
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Selectivity also did not exceed 12 dB.
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Dimensions of the model are 67x108x32 mm.
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