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Portable radio "Koyo-403" has been produced since 1963 by the Japanese company "Koyo Denki".
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Superheterodyne on six transistors.
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MW range - 525 ... 1620 kHz.
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IF - 455 kHz.
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AGC.
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Power supply from 4 elements of "AA" type.
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Maximum output power 300 mW.
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The diameter of the loudspeaker is 7 cm. The range of reproducible sound frequencies is 300 ... 4000 Hz.
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Model dimensions 160 x 80 x 40 mm.
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Weight with batteries 400 grams.
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Since 1964, the "Koyo-403" radio has been produced with a slightly different front panel design, as in the main photo.
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