TUBES = 2 National Union 6J5GT nos-new Factory Matched

Factory matching pair of National Union 6J5GT audio tubes
beautiful USA NOS NIB NEW

is a factory matching pair of National Union 6J5GT audio tubes.

NOS NIB NEW Made in USA Matching date codes "5139" Matching glass codes "E1M" Matching test scores: Tube #1 = 100, Tube #2 = 99. Those test results are uniform and balanced.
Test scores are for percentage dynamic mutual conductance obtained with my professionally calibrated B&K 707 tube tester, and also without shorts or leakage. Scores in the 100 range are perfect new. Since tube testers vary in design and methodology, your test results may vary. Test scores are provided as extra information that some buyers may find useful, and are not intended to be a "warranty of condition."

P.S. - If you are interested in tubes and amplifier technology, be sure to see our Storefront for a US Army Technical Course Lesson that teaches about Tubes, Amps, and Biasing. See Item 7419998407


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