Radio receiver and radiola network tube `` Estonia '' (Estonia-55).

Network tube radiosDomesticSince 1956, the Estonia Punane-RET Tallinn plant has been producing the radio receiver and radiola network tube "Estonia". Since the beginning of 1956, the Punane-RET plant has started to produce a radio receiver of the 1st class "Estonia", another name "Estonia-55" according to the year of development. The receiver case was originally designed for the installation of the EPU for the subsequent release of the radio, or for the installation of the EPU by the owner. Since the fall of 1956, the radio tape "Estonia" ("Estonia-55") has been produced, and the release of receivers has been gradually discontinued. '' Estonia '' is a 5-band 12-tube superheterodyne receiver with a rotatable magnetic antenna for operation on the LW, MW bands, a VHF dipole and a 2-speed electric player EPU-III (in the first releases of EPU-II). Used lamps 6N3P, 6K4P, 6A2P, 6N2P, 6X2P, 6Zh3P, 6P1P, 6E5S, 2 blocks of selenium rectifiers. There is AGC, limiting the IF amplitude in the VHF range, adjusting the IF bandwidth in the AM ranges and adjusting the timbres for LF and HF. The radiola was produced in a desktop and a small series in a floor design. Ranges DV, SV standard, KB1 36.6 ... 75.9 m, KB2 24.8 ... 38.44 m and VHF 4.11 ... 4.55 m. Sensitivity in the AM ranges 50 μV, VHF 10 μV. Selectivity in AM - 46 dB. When receiving, the range of sound frequencies is 50 ... 5000 Hz, in the VHF range of 40 ... 13000 Hz, during operation of the EPU - 60 ... 10000 Hz. Power consumption from the network is 120/140 W. Dimensions 600x435x360 mm. Weight 23 and 25 kg.