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(!!!!!) (Best Overall Pair) 6BK7B RCA black plates "U" getter NOS 1957 (10.2/10.8ma and 10.6/11ma)
(!!!!!) (Best Overall Pair) 6BK7B RCA black plates "U" getter NOS 1957 (10.2/10.8ma and 10.6/11ma)
$ 79.99
1 low noise pair) 6BK7B RCA black plates "U" getter NOS 1957 (KI)
1 tube) 10.6/11.0ma Gm=6700/6900
1 tube) 10.2/10.8ma Gm=6200/6300
Tested on Amplitrex
Good Ma range 6-8ma
Good Gm = 5000-6000
Tested on Amplitrex
(also see 6BZ7 and 6BQ7A, best sub for 6N1, 6N1P)
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See more: vacuum tube