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(!!) (Single) 6060=12AT7 Brimar Thorn UK square black plates triple mica large "O" getter halo 1957 used/good (7.2/7.6ma) (Premium low noise 12AT7)

$ 49.99

1 low noise tube) 6060=12AT7 Brimar Thorn UK square black plates triple mica large "O" getter halo 1957 used/good

1 section) 7.2ma Gm=4300

1 section) 7.6ma Gm=4200

 

Good Ma range 7-9ma

Good Gm range 4000-5000

 

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