Since 1951, the radio tube network receiver "Baku" has produced the Baku Radio Plant. The 2nd class Baku radio, produced from 1951 to 1955 by the Ministry of Local Industry of the Azerbaijan SSR, is a super heterodyne on 6 lamps: 6A7, 6К3, 6Г2, 6П3С, 6Е5С, 5Ц4С. The frequency ranges are: DV 150 ... 425 kHz, CB 510 ... 1630 kHz, KV1 3.95 ... 8 MHz, KV2 9.1 ... 12.4 MHz. IF 465 kHz. Sensitivity 300 µV on all ranges. The selectivity on adjacent channels is 26 dB, mirrored, on DV 36 dB, CB 30 dB, KV 12 dB. Output power 1.5 watts. The frequency range on the speaker DM-2 - 100 ... 4000 Hz. There are external speaker jacks with a transformer, for example a broadcast speaker. The sensitivity from the adapter is 250 mV. The power consumption of 70 watts from the network. Control knobs 2 and both combined. Left volume, turn on and timbre treble, right tuning and band switch. The chassis is steel and covered with aluminum paint. The case is wooden, covered with walnut (birch) plywood, polished and coated with colorless varnish. The dimensions of the receiver are 690x370x270 mm, its mass is 15 kg. The scale with a sub-scale and lighting device is made by a separate unit and is attached to the body. The scale has 5 lines, 4 correspond to the ranges, calibrated in meters, kHz and MHz. 5th, divided into 100 divisions auxiliary. Pointer range of light, where five light bulbs switch when moving from one range to another.