(!!!!) (Pair) 12B4A GE NOS rebranded Raytheon and RCA 1960's (35ma and 37.5ma) (same Gm)

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1 pair) 12B4A GE NOS rebranded Raytheon and RCA 1960's 1 tube) 35.0ma Gm=7000 1 tube) 37.5ma Gm=7000 Matched on Amplitrex Vplate=140 Vgrid=-15V Good Ma range 25-40ma Good Gm = 6000