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Radio "Ether-303" from the radio designer since the beginning of 1991 produced the First Moscow Instrument-Making Plant. Children's radio toy '' Efir-303 '' is designed for beginner radio amateurs and children from 10 years of age. The receiver is a set of radio components and components for assembling a current direct-gain radio receiver. RK set price is 11 rubles. The plant produced and assembled radio (in the photo). Its price is 13 rubles. According to the design and construction of the electrical circuit and technical parameters, the receiver is similar to other models of the same plant of the series "Youth of KP", but the electrical circuit does not coincide with any one.