(!!!) (Recommended Pair) 12B4A GE NOS 1960's (39ma and 39ma)
$ 20.99
1 pair) 12B4A GE NOS 1960's
1 tube) 39ma Gm=7550 GE rebranded Raytheon small "o" getter halo
1 tube) 39ma Gm=7300 GE rebranded RCA large "O" getter halo
Matched on Amplitrex
Vplate=140
Vgrid=-15V
Good Ma range 25-40ma
Good Gm = 6000
See more: vacuum tube
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 (Recommended Pair) 12B4A GE NOS 1960's (39ma and 39ma)&Category=vacuum tube&ImageURL=http://cdn.shopify.com/s/files/1/0333/7633/products/1_2037ed8e-bbaf-4581-8cfb-f3488c32f8d1.jpg?v=1619125061){kind=link}
 (Recommended Pair) 12B4A GE NOS 1960's (39ma and 39ma) "Pin It")