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The Sony TR-55 portable radio was manufactured in August 1955 by Tokyo Tsushin Kogyo, and subsequently Sony.
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The AM range is 535 ... 1605 kHz.
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Sensitivity ~ 2 mV / m.
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The output stage of the bass amplifier is single-ended.
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Maximum output power 25 mW.
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Power - 4 AA elements (1.5 x 4 "u003d 6 volts).
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The range of reproduced sound frequencies is 250 ... 3500 Hz.
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Dimensions of the model are 140x89x38 mm.
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Weight 560 grams.
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The first prototypes of the radio since the fall of 1954 were referred to as "Sony TR-5" in terms of the number of transistors, and later since 1955, "Sony TR-52" in terms of the number of transistors (5) and semiconductor diodes (2).
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The serial model "Sony TR-55" was named after the year of manufacture (1955).
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