(!!) (Best Single) 12AU7A Westinghouse gray plates "O" getter halo 1960's NOS (10.6/11.2ma)

1 low noise tube) 12AU7A Westinghouse gray plates "O" getter halo 1960's NOS

10.6ma Gm=2200

11.2ma Gm=2300

Good Ma = 8-10ma

Good Gm range 1800-2200

Matched on Amplitrex

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