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(1) Tested Sylvania 12JN8 Tube with Box Date Code NR AAA Triode Pentode Tube (a)

(1) Tested Sylvania 12JN8 Tube with Box Date Code NR AAA Triode Pentode Tube (a)

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(1) Tested Sylvania 12JN8 Tube with Original Box.
Date Code NR AAA.

Tested on a calibrated Knight KG-600B tube tester with no shorts where 50 is minimum pass/good with the following results:

Sylvania = 93-96

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