GE 12AU7A Tubo Aspirazione USA 188-4 / 60-26 Testato Forte Audio Hi-Fi Preamplificatore Amplificatore

Model: 12AU7A. Tube Code: (188-4 / 60-26 for GE). good range for emissions and transconductance. Tube shows clear getter flash and clean pins. Condition: Used – Tested Strong. Testing: Tested good on [insert your tester model if known, e.g., B&K 707, Hickok 600A, etc.].

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