The 1930's were the years of transition from imperfect principles of direct amplification (radios series B4, E4S, EKL etc.) to superheterodynes. The latter worked on metallic tubes and ensured characteristics capable of tuning to powerful R-stations all over the world using an outer aereal. Among those we can site 6N1, SVD of different models, which became mass receivers for urban listeners. Battery radios, such as RPK, BI-234 etc. also existed for areas having no AC network. Crystal sets were also produced at the time.
Listen to the music of those times:
N.Khromchenko , A.Pogodin, E.Utyosova
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"DV-5" crystal radio. Model 1929. Moskow Electro-Mechanic Factory.
"Radiolina". The first Soviet tube receiver. Model 1924. Trust of Low-Voltage Factories.
"BV". Model 1924. Trust of Low-Voltage Factories.
"BCh". Model 1924. Trust of Low-Voltage Factories.
"BChZ". Model 1928. Trust of Low-Voltage Factories.
"EChS-2" with "Rekord" speaker. Model 1932. Moscow Ordzhonikidze Radio Works.
"EKL-34". Model 1934. Leningrad Kozitsky Works
"SI-235". Model 1935. Moskow Orjonikidze Radio Works.
"4NBS-6" Model 1939. Voronezh "Electrosignal" Works.
"6NG-1". Model 1937. Voronezh "Electrosignal" Works.
"SVD-1". Model 1937. Alexandrov Radio Works.
"SVD-9". Model 1938. Alexandrov Radio Works.
"9N-4". Model 1937.
"SVG-K". Model 1938. Alexandrov Radio Works.
"D-11". Model 1939.
