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Since 1950, the Punane-RET Tallinn plant has produced the Punane RET "VV-662" network lamp receiver. The radio receiver was developed on the basis of the Punane RET '' VV-661 '' model and in the first editions in appearance design was practically no different from it. Since 1951, the appearance has been slightly modified. The Punane RET '' VV-662 '' radio receiver is a six-lamp superheterodyne of the second class of the desktop type. The ranges of radio waves are DV 150 ... 410 kHz, CB 520 ... 1500 kHz, KV-1 4 ... 13.5 MHz, KV-2 13.5 ... 18.7 MHz. The intermediate frequency is 465 kHz. Sensitivity on all ranges 150 ... 300 µV. The neighboring channel selectivity is 26 dB, the mirror channel on the LW, CB is at least 30 dB, on the KV-1 and KV-2 subbands is at least 12 dB. The nominal output power of the LF amplifier is 1.5W. The band effectively reproduced sound frequencies of 100 ... 3500 Hz. Power consumption 70 watts. The dimensions of the radio receiver are 610x340x260 mm. Its weight is 16 kg.