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(!!) (Recommended GE Pair) 12B4A GE NOS 1960's - 1970 rebranded Zenith and ITT (39ma and 42ma)

(!!) (Recommended GE Pair) 12B4A GE NOS 1960's - 1970 rebranded Zenith and ITT (39ma and 42ma)

$ 15.99

1 pair) 12B4A GE NOS 1960's

1 tube) 39ma Gm=7500 GE branded Zenith 1970

1 tube) 42ma Gm=7500 GE branded ITT

 

Matched on Amplitrex

Vplate=140

Vgrid=-15V

Good Ma range 25-40ma

Good Gm = 6000

 

 

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