This listing is for two GE 12AU6 vacuum tubes that have been tested. These tubes are new old stock (NOS) and come in their original boxes (NIB).

Box shows signs of wear/tear from being in storage.

Tested per user manual procedures on recently calibrated Hickok 6000A.

Passed all tests:

Filament Continuity Test: Passed

Shorts Test: Passed

Quality Test: Passed

Mutual Conductance Test: 2500 & 2700/2300 (2300=NOS MINIMUM)

Gas (Grid Current) Test: Passed

Life Test: Passed