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