Sjurpriz 1967
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The souvenir radio receiver "Surprise" from I quarter of 1967 produced the Grozny radio engineering plant. Radio "Surprise" released on the 50th anniversary of the October Revolution. Structurally, it is made in the form of an elegant notebook. This was achieved thanks to the use of a specially created miniature loudspeaker with a 40 mm diaphragm diameter and 4 mm height. The receiver is assembled on a superheterodyne circuit on 6 transistors and 1 diode. The receiver is designed to receive on the built-in magnetic antenna of broadcasting stations operating in the range of SV - 1605 ... 525 Hz. Real sensitivity 3 mV / m. The adjacent channel selectivity is 12, and 20 dB in the specular one. The range of reproduced sound frequencies is 500 ... 3000 Hz. The maximum output power at the 0.05 GD-1 loudspeaker is 100 mW. Powered by three D-0.1 batteries, with a total voltage of 3.6 V. Resting current 12 mA. The dimensions of the radio with a notebook 135x88x17 mm, weight 200 g. Radio Surprise was exported to a number of foreign countries.
Information from collection of Valery Khartchenko