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The radio battery "BI-234" (collective farm) since 1934 produced the Moscow factory named after Ordzhonikidze. Since 1936, the production of the receiver transferred to the Voronezh plant '' Electrosignal ''. '' BI-234 '' - stands for Battery, Individual use, 2-lamp, 3-circuit, model 1934. The receiver is designed to work in rural areas, which is why it was often called "collective farm". According to the scheme - this is a resonant receiver with feedback type 1-V-1. The receiver is designed to work with an electro-magnetic loudspeaker of the "Record" type. Output power 0.1 watts. The range of received waves is 200 ... 2000 m. In the case of receiving a powerful local station, it is possible to turn off the first stage and work on 2 others. The receiver is decorated in a wooden box pasted over with leatherette, has a removable back wall. The installation is made on a stamped chassis inserted into the box. Four control knobs are displayed on the front panel; this is a setting with correction, a volume control, feedback adjustment, and a band selector. The glow switch is combined on the same axis with the volume control. Antenna, grounding, loudspeaker jacks, a rheostat, jacks for switching from three stages to two and a power supply hose terminated in wooden pads with terminals for connecting batteries are placed on the rear wall of the chassis. The receiver used lamps: SB-154, UB-152 and SB-155. For the glow, a battery of 2 V is needed, while the current consumption is 0.4 A, for the anode 100 V at a current of 8.5 mA. The range is divided into 2 sub-ranges of LW - 714 ... 2000 m and MW - 200 ... 545 m. Sensitivity with feedback enabled ~ 500 µV, 30 mV / m switched off. Case wooden, size 350h280h180 mm. The weight of the receiver is 3.3 kg.