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Portable radio receiver "Transetta 581" has been produced since 1958 by WSW (Siemens), Austria).
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Superheterodyne with 7 transistors.
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MW range - 200 ... 550 meters plus 1 frequency in LW.
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Readout in meters.
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IF 460 kHz.
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Sensitivity 1 mV / m.
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Selectivity 24 dB.
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Power supply three tubular elements of 3 V. Loudspeaker with a diameter of 8 cm. Sound frequency range 250 ... 4000 Hz.
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Dimensions of RP 175x102x54 mm.
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Weight 1 kg.
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