Network tube radio receiver '' Riga-10 ''.

Tube radios.DomesticSince 1952, the network lamp radio receiver "Riga-10" has been producing the Riga Radio Plant named after A.S. Popov. The radio receiver "Riga-10" is a ten-lamp, five-band superheterodyne that provides high-quality reception of broadcasting stations in the DV, SV, HF bands (3 half-extended sub-bands). The receiver can be used as an amplifier with speakers, for playing a record from an external electric player. The number `` 10 '' in the name means the number of radio tubes. For the implementation of high-quality sound in the speaker, a powerful full-range loudspeaker and separate tone control for bass and treble are used. There is a switchable IF bandwidth combined with the HF tone control knob. The scale is divided into 5 sub-bands and is hidden behind the front panel. A part of the scale corresponding to the working range is visible in the window. The scale is illuminated by 2 incandescent bulbs and is graduated in meters. The radio is decorated in a wooden table case. It is finished like precious woods, polished and varnished. Technical characteristics: Range of received frequencies and waves: DV - 141.5 ... 438 kHz (2000 ... 723 m); SV - 510 ... 1622 kHz (576.9 ... 187.5 m); KV-1 3.95 ... 5.75 MHz (76.0 ... 52.2 m); KV-II 6.0 ... 7.4 MHz (50..40.5 m); HF-III: 9.45 ... 12.1 MHz (31.7 ... 24.8 m). Intermediate frequency = 464 kHz. Sensitivity in all ranges 50 μV. Adjacent channel selectivity 46 dB. Attenuation of the signal through the mirror channel; on DV - 60 dB, on MW - 50 dB, on HF - 26 dB. The AGC efficiency is characterized by a 4.5 dB change in the output signal, when the signal in the antenna changes by 60 dB. The bandwidth of the receiver ensures the reproduction of audio frequencies - 60 ... 6500 Hz. Rated output power 4 W, maximum 8 W. Average sound pressure 25 bar. The receiver is powered by an alternating current electrical network with a voltage of 127 or 220 V. The power consumed from the network does not exceed 85 W. The dimensions of the receiver are 605x310x340 mm. Its weight is 24 kg.