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(!!) (Recommended Pair) 12B4A GE NOS 1960's - 1970's same build (30ma and 30.5ma)

(!!) (Recommended Pair) 12B4A GE NOS 1960's - 1970's same build (30ma and 30.5ma)

$ 21.99
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1 pair) 12B4A GE NOS 1960's - 1970's same build

1 tube) 30ma Gm=6600 GE

1 tube) 30.5ma Gm=6700 GE rebranded Raytheon

 

 

Matched on Amplitrex

Vplate=140

Vgrid=-15V

Good Ma range 25-40ma

Good Gm = 6000

 

 

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