Portable transistor radio receiver `` Etude-603 '' (Etude-3).

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