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NRI-NATIONAL-RADIO-INSTITUTE 88 0,17-30MHZ PROFESSIONAL SIGNAL GENERATOR SM Service Manual download, schematics, eeprom, repair info for electronics experts
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File:Vintage National Radio Institute (NRI) Radio Kit With Optional NRI Supplied Wood Cabinet, AM Band, 6 Vacuum Tubes, Circa 1950s (37103827241).jpg - Wikipedia
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