Portable transistor radio "Chaika".
Portable radio receivers and radios on p / p.DomesticThe "Chaika" portable transistor radio receiver has been prepared for production since 1960 by the Leningrad plant "Radiopribor". The receiver uses 6 transistors and 1 diode. Installation is printed. A small-sized loudspeaker with a cone diameter of 50 mm and a height of 20.5 mm is installed at the output. Voice coil impedance 7 ohm. Rated output power 100 mW. Sensitivity at medium waves 2.5 mV / m, at long waves 5 mV / m. Selectivity is about 15 dB. Attenuation on the mirror channel in both ranges is 16 dB. The use of AGC does not allow a change in the output voltage by more than 12 dB when the signal at the input changes by 25 dB. SOI 6%. IF 465 kHz. An interesting feature of the receiver is the use of two ferrite rods, one for each band. Power supply from a battery with a voltage of 9 V or from 7 oxide-mercury cells OP-2k. You can use a 7D-0.12 battery. The current consumption in silent mode is 7.5 mA, at a rated power of 30 mA. Receiver weight with battery 300 gr. The "Chaika" radio was not mass-produced. Several prototypes were produced.