From March I, in 1964, the Tallinn-based Punane-RET plant produced the radio tube network lamp Estonia-3M. Radiola high class '' Estonia-3M '' is designed to receive radio broadcasting programs in the bands DV, SV, KV and VHF, as well as to play records at 33, 45 and 78 rev / min. There is a slot for recording phonograms on a tape recorder. Recording is done from the output of the detectors or ULF. In addition, there is a jack for turning on the stereo set-top box. Radiola '' Estonia-3M '' is an eight-band superheterodyne with an integrated rotatable magnetic antenna for operation on the SV, DV bands and a built-in dipole for operation in VHF. The radiolouver used 12 radio tubes of the type: 6F1P, 6K4P, 6I1P, 6N2P, 6P14P, 6G1P, 6E1P and 6 semiconductor diodes. Provides AGC, the limitation of the amplitude of the inverter in the VHF-FM, a smooth adjustment of the bass and treble tone, the adjustment of the IF band and the 5-key voice register. Radiol was produced in both desktop and outdoor design. Ranges: DV, SV, KB-1 50.8 ... 76 m, KB-2 48 ... 50.8 m, KB-3 40.55 ... 43.2 m, KB-4 28.85 ... 34.3 m, KB-5 24.8 ... 26.4 m, VHF 4.11 ... 4.56 m waves. Sensitivity to DV, SV, KB 50 µV, VHF 5 µV. Selectivity in AM ranges 60 dB. When receiving, the radioloured reproduces the frequency band in the AM ranges 60 ... 6000 Hz, FM - 60 ... 15000 Hz, with an EPU operating 60 ... 10,000 Hz. Power consumption at reception 90 and 105 W during the operation of EPU. Dimensions of the radio are 850x350x360 mm. Weight 32 kg. From 1964 to 1966 incl. released 59,224 copies. radiol.