The GE 7581 KT66 Tube is a high-quality power tube ideal for vintage audio equipment. Made in the United States, this tube has been tested and confirmed to be in good working condition. Perfect for audiophiles and enthusiasts looking to enhance their sound system with authentic vintage parts. Add this reliable GE tube to your collection for a true retro audio experience.

Tune was tested on a Stark 12-22A mutual conductance tube tester and showed a reading of 4900. A minimum good tube tests at 3720.

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