Description
This high-quality NOS/NIB RCA 6SL7GT vacuum tube boasts black plates and has been thoroughly tested on a Hickok. Box shows signs of wear/tears 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:1075 & 1050 /1000 (1000 =NOS Minimum) Gas (Grid Current) Test: Passed Life Test: Passed