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The portable radio "Spidola-231" from I quarter of 1975 produced the Riga Radio Factory VEF. Portable transistor radio second class "Speedol-231" superheterodyne type, assembled on 12 transistors and 3 diodes. The receiver operates in the ranges of DV, ST and five HF subranges 25, 31, 41, 49 and overview from 52 to 75 meters. The rated output power of the 1GD-4A loudspeaker is 400 mW, the maximum 800 mW. The radio receiver is assembled on the basis of the '' Speedol-230 '' radio receiver and, in the absence of the LED indicator, its settings are similar.