(!!!) (Best Single) 6BQ7A RCA black plates NOS 1967 (11.5/13.5ma)

1 low noise tube) 6BQ7A RCA black plates NOS 1967

11.5ma Gm=8000

13.5ma Gm=8400

Tested on Amplitrex

Good Ma = 8-10+ma

Good Gm = 6000-6400

(also see 6BZ7 and 6BK7B)

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