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The radio battery "TL-4" from 1928 produced factories MEMZA and Moselektrik. Three-tube regenerative receiver "TL-4" assembled according to the scheme 0-V-2. The range of received waves is 350 ... 1700 meters. Mounted in a wooden box in the form of a remote (tilted control panel). Tuning to a wave is made by a sectioned self-induction coil and a variable capacitor. Feedback is controlled by rotating the feedback coil, two low-frequency amplification stages operate on transformers. The receiver has low sensitivity and selectivity. Simple enough to manage. It gives a loud-speaking reception (to loudspeakers such as "Record", "Bozhko", "Profradio") of local stations, as well as receiving powerful stations at a distance of up to 1000 kilometers or more in the absence of large interferences. Receiver price 71 rubles. 21 kopecks Produced and kit for self-assembly at a price of 62 rubles. 21 kopecks