Radiola network lamp `` Symphony-003 ''.
Network tube radiosDomesticRadiola network lamp "Symphony-003" has been produced since 1971 at the Riga Radio Engineering Plant. The top-class stereophonic radio "Symphony 003" is developed on the basis of the "Symphony-2" radio, but differs from it. The electrical circuit has been improved, new materials for decoration have been applied, a push-button range switch, a more advanced EPU type II-EPU-52S with hitchhiking has been used. The receiver has the ranges DV, SV, KV 1-4 and VHF. Sensitivity in AM ranges - 30, FM - 2.5 μV. Selectivity 60 dB. The band of reproducible frequencies in the AM ranges 40 ... 7000 Hz, FM and when playing records 40 ... 15000 Hz. The power amplifier is made on 6P14P lamps, switched on according to an ultra-linear circuit with auto-bias, and has an output power of 2x4 W. Speakers are three-way, closed type, each has 6GD-2, 3GD-1 and 1GD-3 loudspeakers. The dimensions of the speakers are reduced in comparison with those used in the Symphony 2 radio. Due to the high sensitivity of the speaker heads, it develops a sound pressure of 112 dB at a distance of 1 m, with a power input of 4 W. Power consumption with EPU 130 W. Dimensions of the radio 795x525x375 mm, weight 37 kg. Dimensions of one speaker 790x350x285 mm, weight 14.5 kg. In 1976, a small series of "Symphony-003M" radiolabels was released, which practically did not differ from the basic one. The export radio, produced since 1971, was called Rigonda-Bolshoi, it had other frequencies in the VHF range and HF subbands and all, respectively. the inscriptions were in English.
