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Portable radios "Spidola-230" and "Spidola-230-1" from 1973 and 1975 produced the Riga radio plant "VEF". The 2nd class radio receivers '' Spidola-230 '' and '' Spidola-230-1 '' are intended for reception in the LW, MW and 5 HF sub-bands. They have a built-in magnetic antenna and, in the KV range, a pin telescopic, smooth timbre control on HF and stepped to two positions on LF, a tuning indicator, a scale backlight, an external antenna jack and grounding, tape recorder, headset, loudspeaker and external power. Launched since 1975, the receiver '' Spidola-230-1 '' except for the name does not differ from the model '' Spidola-230 ''. Sensitivity with a magnetic antenna in the ranges of DV - 1.5, SV - 0.8 mV / m, with a pin in the KB sub-bands - 200 ÂµV. With an external antenna in the Far East - 300, SV and KB - 200 ÂµV. Selectivity in the ranges of DV, SV - 34 dB. IF - 465 kHz. AGC action: when the input signal changes by 30 dB, the output voltage changes by 10 dB. Band of reproducible frequencies - 125 ... 4000 Hz. Rated output power 0.4 watts. Power supply from 6 elements 373. Radio dimensions - 365x250x100 mm. Weight 3.2 kg.