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The radio battery "LB-1" since 1924 produced a trust of factories of weak current. Single-tube regenerative radio "LB-1" is designed to receive radio stations on handsets. The receiver is made on the basis of the tuning contour of the first set of the Radio Link and coincides in appearance and design with it, differing only in the built-in lamp regenerative detector cascade. The range of the receiver was from 250 to 2000 m. The receiver allowed to receive radio stations remote to a thousand kilometers. The design and external design of the receiver is similar to the model "R-1" of the same trust of weak current plants.