Radiola network lamp "Rigonda-Mono".
Network tube radiosDomesticConsole radio of the 1st class "Rigonda-Mono" since 1964 was produced by the Riga Radio Plant named after A.S. Popov. Radiola is designed to receive broadcasting stations in the ranges: DV, SV, two sub-bands of HF and in the VHF range. Sensitivity in the ranges MW, LW is about 30 μV, in the HF sub-bands 60 μV, on VHF 5 μV, with a built-in magnetic antenna in the ranges DV, SV 0.6 ... 1.2 mV / m, and in the position `` local reception '' 0.3 ... 1.5 mV. IF path AM 465 kHz, path FM 6.5 MHz. Selectivity in LW, MW ranges 65 dB. Selectivity on the mirror channel in the ranges DV 66 dB, SV 46 dB, KV 20 dB, VHF 28 dB. AGC provides a change in the signal at the output of no more than 12 dB when the signal at the input changes by 40 dB. The nominal output power of the amplifier is 2 W, the maximum is 3.5 W. Pickup sensitivity 0.15 mV. The range of sound frequencies of the reproduced speakers when receiving in the VHF range of 60 ... 12000 Hz. Separate tone control for bass and treble. The power consumed from the network when receiving 55 W, when playing a record 65 W. A three-speed EPU is installed in the radio, with a microlift, semi-automatic switching on and automatic switching off. Structurally, the radio is placed in a floor case, the speaker is located in the lower compartment of the case and consists of two front speakers 4GD-28 and two side loudspeakers 1GD-28, an EPU is installed in the upper part of the case. The dimensions of the radio are 640x355x555 mm. Weight 24 kg. In 1966, the radio was modernized, some of its components and parts were unified, EPU III-EPU-20 was replaced by II-EPU-40, the `` stereo '' key was removed, the scale design changed. "Rigonda-Mono" was the first unified (USRL-1) model, according to its design and scheme, different factories in the country produced the same, but different design, radios with the names: "VEF-Radio", "VEF-Rhapsody", Ural-1, Ural-2, Ural-3, Ural-5 and Ural-6.
