This vintage NOS/NIB 6U10 Triple Triode tube from GE.

This came from electronics/TV store closing auction of inventory parts. It was in box labeled spare parts inventory. Box shows signs of wear 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: all 3 diodes are at or slightly above NOS

Gas (Grid Current) Test: Passed

Life Test: Passed