Modular radio constructor `` Electronic cubes '' (MRK-2).

Radio and electrical constructors, sets.Multifunctional devicesThe modular radio designer "Electronic Cubes" (MRK-2) has been producing since 1977 at the Leningrad Experimental Plant at the Research Institute "Elektrostandart". Modular radio constructor "Electronic cubes" (MRK-2) is designed to improve the knowledge and practical skills of middle and older schoolchildren in the field of radio electronics "Electronic cubes" can also be an entertaining toy for children of primary school age. The radio designer will also be useful for novice radio amateurs. With its help, you can assemble various electronic devices without soldering, tools and additional wires. The manual attached to the radio designer contains 40 electronic circuits. The power source for the circuits is the Kron battery.