Geolog-2 1972
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Since 1972, the portable transistor radio receiver "Geolog-2" has been producing the Dnepropetrovsk Radio Plant. ,86e6f450b8cc469628ba70bf2947b049 The radio receiver is made on the basis of the Geolog radio receiver, differing in the use of three microcircuits of the K237 series. ,86e6f450b8cc469628ba70bf2947b049 They work in a frequency converter, local oscillator, IF amplifier, detector and LF preamplifier. ,86e6f450b8cc469628ba70bf2947b049 To ensure high selectivity in the adjacent channel, the piezoceramic filter used in the Geolog model was replaced by a four-loop FSS. ,86e6f450b8cc469628ba70bf2947b049 To raise the frequency response in the region of low sound frequencies, a T-shaped low-pass filter is included at the ULF input. ,86e6f450b8cc469628ba70bf2947b049 As in the Geolog receiver, a 1GD-39 loudspeaker is installed here. ,86e6f450b8cc469628ba70bf2947b049 Rated output power 0.5 W. ,86e6f450b8cc469628ba70bf2947b049 The receiver is powered by 6 elements 373. The dimensions of the model are 290x190x90 mm, its weight is 3 kg. ,86e6f450b8cc469628ba70bf2947b049 ,null,ru,null,null,null,null
Documentation:
Information from collection of Valery Khartchenko