The Etude-603 portable transistor radio receiver has been produced by the Minsk Radio Plant since October 1971.
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At first, the receiver was called Etude-3, according to the design option, later Etude-603.
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The numbers 603 mean the receiver is out of class.
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The radio is an upgrade of the Etude-2 model, but its layout is different from its predecessor.
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A belt in the form of a loop worn on the wrist is used for carrying.
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The receiver uses new silicon transistors KT315 and a piezoceramic filter PF1P-11.
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The circuit presents an opportunity to switch to integrated MS in the future (it did not work out).
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Ranges DV and SV.
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Sensitivity 3.0 and 2.5 mV / m.
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Selectivity 16 dB.
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The rated power of the ultrasonic unit is 60 mW.
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Loudspeaker 0.1GD-13.
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Powered by Krona battery.
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Quiescent current 10 mA.
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Dimensions of the model 148x80x25 mm.
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Weight 230 gr.
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The export receiver was called "COMIX-102".
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