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(!!!) (Best GE Pair) 12B4A GE NOS 1967 (49.5ma and 51ma) closely matched

(!!!) (Best GE Pair) 12B4A GE NOS 1967 (49.5ma and 51ma) closely matched

$ 19.99

1 pair) 12B4A GE NOS 1967 (IW) "o" getter halo

1 tube) 49.5ma Gm=7900 

1 tube) 51.0ma Gm=7900 

 

Matched on Amplitrex

Vplate=140

Vgrid=-15V

Good Ma range 25-40ma

Good Gm = 6000

 

 

 

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