Sorry, this page is not translated yet. Automatic translation used.
The monophone "Concert-305" monophone has been prepared for release since 1974 by the Moscow Experimental Plant "Agregat". The case of the microphone consists of two parts with a locking device. In the engineering part there is an EPU with a low-frequency amplifier, volume and tone controls, an on indicator light and a signal connector (located on the front of the EPU), and in the upper speaker system. The electrophone did not go into production, but on its base, the CONCERT-304 electrophone was manufactured on its basis since 1977, which is analogous to the Concern-305 electrophone by electrical circuit, EDA and TX.