The network tube radio "Zenith 7-S-323" has been produced since 1939 by the "Zenith Radio" corporation, Chicago, USA.
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Superheterodyne on seven radio tubes.
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Ranges: MW - 550 ... 1725 kHz.
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SW-1 - 2.3 ... 7.8 MHz.
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SW-2 - 7.75 ... 24.5 MHz.
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IF - 455 kHz.
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The US Maritime and Police Services worked on the MW range from 1600 to 1725 kHz.
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Powered by 115 volt alternating current.
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Speaker diameter 20.3 cm. Model dimensions 585 x 355 x 320 mm.
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Weight 9.2 kg.
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No information on window buttons.
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Perhaps they were used in some other model, since in those years chassis No. 5714 was used quite widely in many designs of radio receivers and radio transmitters.
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