Reissue Mullard 12AX7 / ECC83 Preamp Tube NIB HICKOK TESTED Strong NOS Balanced sides Tested per user manual procedures on recently calibrated Hickok 6000A. Test results will vary between testers. Passed all tests: Filament Continuity Test: Passed Shorts Test: Passed Quality Test: Passed Mutual Conductance Test: 1700 & 1650 / 1250 (NOS MINIMUM) Gas (Grid Current) Test: Passed Life Test: Passed Also tested in THD Bi Valve Guitar amp for performance and sound at operating voltage. Will combine shipping.
60%
Mullard 12AX7 MULLARD Vaccum Tube
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