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(!) (#1 12B4A Sylvania Pair) 12B4A Sylvania NOS 1960's - 1970's (34ma and 32ma)

(!) (#1 12B4A Sylvania Pair) 12B4A Sylvania NOS 1960's - 1970's (34ma and 32ma)

$ 15.99

1 platinum pair) 12B4A Sylvania NOS 1960's - 1970's
1 tube) 34ma Gm=6700 (red printing)
1 tube) 32ma Gm=6200 (yellow printing)

Matched on Amplitrex

Vplate=140

Vgrid=-15V

Good Ma range 25-40ma

Good Gm = 6000

 

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