(!) (Recommended Pair) 12B4A Sylvania NOS 1960's (26ma and 27ma)
By Tube World
$ 19.99
1 pair) 12B4A Sylvania NOS 1960's same build in white boxes
1 tube) 27ma Gm=5800 (red printing)
1 tube) 26ma Gm=5800 (white printing) ITT
Matched on Amplitrex
Vplate=140
Vgrid=-15V
Good Ma range 25-40ma
Good Gm = 6000
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See more: vacuum tube
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 (Recommended Pair) 12B4A Sylvania NOS 1960's (26ma and 27ma) "Pin It")