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*
Bid is for one tube,
as pictured.
<<<<<<< As pictured = What you see is what you get >>>>>>>
*
Hickok 539B* tested
Test Results
Please refer to title heading
minimum recommended value for a good tube
54 / 54
(Plate#1 / Plate#2)
*Hickok 539B is a mutual conductance(Gm) type tube tester. It does check for mutual conductance which is a more accurate measure of tube's age.
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