(!!!) (Best Pair) 12B4A GE NOS 1962-1977 same build (52ma and 53ma)
$ 21.99
1 pair) 12B4A GE NOS same build
1 tube) 52ma Gm=8200 1977
1 tube) 53ma Gm=8000 1962
Matched on Amplitrex
Vplate=140V
Vgrid=-15V
Good mA range 25-40ma
Good Gm = 6000
See more: vacuum tube
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 (Best Pair) 12B4A GE NOS 1962-1977 same build (52ma and 53ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_f9dc9842-5307-4159-bc0f-aa77dbab58a1.jpg?v=1735848421){kind=link}
 (Best Pair) 12B4A GE NOS 1962-1977 same build (52ma and 53ma) "Pin It")