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(!!) (Recommended Pair) 12B4A GE NOS 1960's same build (32.5ma and 34ma)

(!!) (Recommended Pair) 12B4A GE NOS 1960's same build (32.5ma and 34ma)

$ 19.99

1 pair) 12B4A GE NOS 1960's same build

1 tube) 32.5ma Gm=6950 GE rebranded Motorola 1963

1 tube) 34ma Gm=7100 GE rebranded RCA

 

 

Matched on Amplitrex

Vplate=140

Vgrid=-15V

Good Ma range 25-40ma

Good Gm = 6000

 

 

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