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(!!!) (Recommended Pair) 12B4A GE NOS 1960's (32.5ma and 33ma)

(!!!) (Recommended Pair) 12B4A GE NOS 1960's (32.5ma and 33ma)

By Tube World

$ 19.99

1 pair) 12B4A GE NOS 1960's
1 tube) 32.5ma Gm=6500
1 tube) 33.0ma Gm=6900 

 

Matched on Amplitrex

Vplate=140

Vgrid=-15V

Good Ma range 25-40ma

Good Gm = 6000

 

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