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A note about our vacuum tubes...
Our tubes are evaluated with a B&K model 747B Solid State Tube Tester. We run the tester’s procedure for checking grid emission, tube condition, life, and gas leakage.
Whenever possible, we'll include the tube's original packaging. Keep in mind that due to several factors such as age, previous storage conditions, etc. - boxes might be stained, faded, or otherwise, just a bit beat up.
Whatever the case, we'll include the package in the pictures for you to an idea of the history (or mystery) surrounding the vintage vacuum tube offered.
That said, these tubes are guaranteed; if you get an unsatisfactory one, please let us know.