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Matched Pair Test NOS Sylvania JG-12AU7WA 6189 12AU7 Vacuum Tubes - TV7 Tested
Matched Pair Test NOS Sylvania JG-12AU7WA 6189 12AU7 Vacuum Tubes - TV7 Tested
Matched Pair Test NOS Sylvania JG-12AU7WA 6189 12AU7 Vacuum Tubes - TV7 Tested
Matched Pair Test NOS Sylvania JG-12AU7WA 6189 12AU7 Vacuum Tubes - TV7 Tested

Matched Pair Test NOS Sylvania JG-12AU7WA 6189 12AU7 Vacuum Tubes - TV7 Tested

$ 14.79

  • Brand: SYLVANIA
  • Country/Region of Manufacture: United States
  • MPN: 12AU7WA
  • Model: 6189
  • Seller Notes: “Tested Matched/Balanced at NOS Levels on Dan Nelson Calibrated/Upgraded TV7 Digital Meter Gm & mA”
  • Type: Preamp Tubes

Description

Matched/Balanced Pair Sylvania JG-12AU7WA 6189 Vacuum Tubes Test Results: NO Shorts, No Leakage, No Gas, No Micro-Phonics detected Tube 1: 95 = 2,375 uMhos Transconductance (Gm) at 8.5 mA (Ia =Anode Plate Current) 93 = 2,325 uMhos Transconductance (Gm) at 8.0 mA (Ia =Anode Plate Current) Tube 2: 91 = 2,275 uMhos Transconductance (Gm) at 7.9 mA (Ia =Anode Plate Current) 94 = 2,350 uMhos Transconductance (Gm) at 8.6 mA (Ia =Anode Plate Current) For Reference: The Minimum good value for a ECC82/12AU7/6189 tube tested on all TV7 versions is 56/56 = 1,400/1,400 uMhos Gm 'Bogey': Factory Data Sheet NOS when new 88/88 = 2,200/2,200 (μ℧ ) uMhos Transconductance (Gm) at 10.5/10.5mA Anode Plate Current Dissipation @ 250V. TV7 tests @ 150V. Our test set: Dan Nelson restored, upgraded and calibrated, TV7A/U with Digital Meter reading Transconductance in uMhos (Gm) and mA (Anode Plate Current). Many years of shipping Experience with FRAGILE Vacuum Tubes and Vintage Electronics