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*

Bid is for one tube, U.S.A made,
as pictured.

<<<<<<<< What you see is what you get = As pictured >>>>>>>>

*

Hickok 539B* tested

Test Results
108/105

(Plate#1 / Plate#2)

minimum recommended value for a good tube:
 54/54

*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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