Network tube radio receiver '' P-5 ''.

Network tube radiosDomesticRadiola network lamp "Riga-T 689" was developed in 1946 by the Riga plant "Radiotekhnika". Radiola "Riga T-689", perhaps this, perhaps in a different version, was developed by the design department of the "Radiotekhnika" plant. An experimental series was released, but the model did not go into mass production, only the receiver of the same name was produced. On its basis, a lot of home-made radiolocals have been created, there is information about this on the site "Old Radio".