CV 591

The CV 591 is a reduced-size air-dielectric variable capacitor with a built-in reduction drive, put into production in 1958 at Radio Popular in Bucharest, the factory that became Electronica in 1960 [1]. The standard-size type made at the same time was the CV 581 [1].

In the same period the Opereta S 572 A, the first Romanian-designed radio receiver, was built with the variable capacitors and dual potentiometers made for the first time in Romania [1]. Before 1958 the factory assembled its radios mostly from imported kits; from the mid-1950s it gradually replaced imported parts with its own: loudspeakers (1954), ceramic magnets (1956), potentiometers (1957), variable capacitors (1958), transformers, RF blocks and piano-key waveband switches [1].