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Tested and matched pair 2 tubes of lownoise 7Pin NIBNOS JAN 5654W Vacuum Tubes. Considered one of the best of the 5654 6AK5 EF95 family of tubes for audio use.Our platinum Grade 5654W vacuum tubes are matched within 3 for both plate current ip and mutual conductance Gm and are backed by a nononsense 2year warranty.We guarantee that the 5654W tubes selected for our Platinum Grade matched pairs test at NOS levels at or above 4500 micromho with a plate current of 6.6 mA or higher. All tubes must also pass a specialized life test and an audio sound test.Riverstone Audio Platinum Grade tubes are provided with data labels showing measured ip and Gm.Amplifier damage can occur if you substitute the wrong type of tube. 5654W tubes should only be used to directly replace 7Pin 6J1, 6J1P 6J1PEB 6Zh1PEV, 6AK5, 6AK5W and EF95 tubes. DO NOT substiture for other types of 7pin vacuum tube unless approved as a substitute by the manufacturer of your audio device.AN 5654W tubes, and many other vintage USmanufactured vacuum tubes, used waterbased silkscreen printing for final tubemarkings. As the print is waterbased, the original greencolor print may be faded or partially missing due to the age of the tubes the manufacture of 5654W tubes ended approx. 35 years ago. However, determining the authenticity of a 5654W tube is straightforward, as both 5654 and USA were etched into the glass during the original manufacturing process this whitegray lettering can be seen in one of the listing images. The green print was used by the orignal factory to denote details such as JAN 5654W, Made in USA, factory logo and date and factory codes. MORE DETAILS asin B01BFJDTW0 bestsellersrank 33,302 in Electronics See Top 100 in Electronics 169 in Audio Component Amplifiers brandname Riverstone Audio color Silver customerreviews 4.8 4.8 out of 5 stars 1,977 4.8 out of 5 stars manufacturer RiverstoneAudio manufacturerwarrantydescription Riverstone Audio 2year warranty. materialtype Glass maximumpressure 7 bar nominalwallthickness 1.3 mm unitcount 2 Count upc 763769918220
