Network tube radios '' Chaika ''.

Network tube radiosDomesticNetwork tube radios "Chaika" have been produced since 1953 and 1955 at the Novosibirsk plant "Electrosignal". Radiola "Chaika" consists of a six-lamp receiver, combined in a housing with a universal EPU, where an asynchronous motor DAG-1 with frictional deceleration and a piezoelectric pickup ZPU-1 are used. Frequency ranges: DV - 150 ... 415 kHz. SV - 520..1600 kHz. KV-1 3.95-7.5 MHz. KV-2 9.7..12 MHz. Sensitivity 200 µV in LW, MW ranges and 300 µV in HF. Selectivity on the adjacent channel 26 dB in the LW and MW bands, 18 dB in HF. On the mirror channel 20 and 12 dB. SOI 7%. The audio frequency band during the operation of the EPU is 100 ... 5000 Hz, the receiver is 100 ... 4000 Hz. Power consumption during operation of EPU 90, radio 75 watts. The tuning pointer serves as an indicator of the included range. It is made in the form of a bright spot of light moving along the scale when the control knob is turned. Structurally, it is a movable carriage with 4 slots at the level of the scales. When changing ranges, the operating range lamp comes on. There were radios with an arrow, where the scale was illuminated by bulbs. The transition from reception to EPU is carried out in the 5th position of the range switch. Dimensions 520x340x370 mm, weight 18 kg. In 1955 the radio was modernized. With the previous scheme, a new case and EPU were used. Radiolas were with a tuning indicator in the form of a beam of light and a carriage and with an arrow and lighting of the scale with bulbs. The characteristics of the new radio are the same as those of the previous one.