(!) (Recommended Pair) 12B4A RCA NOS 1963 (40ma and 41ma)
$ 21.99
1 matched pair) 12B4A RCA NOS 1963
1 tube) 40ma Gm=6800
1 tube) 41ma Gm=6750
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 RCA NOS 1963 (40ma and 41ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_a3bf845f-cfb5-4451-8300-598f7f86c927.jpg?v=1734076313){kind=link}
 (Recommended Pair) 12B4A RCA NOS 1963 (40ma and 41ma) "Pin It")