(!) (1 Pair) 31 Sylvania rebranded Zenith NOS 1940's (12.8ma and 13.6ma)
$ 34.99
1 pair) 31 Sylvania rebranded Zenith NOS 1940's
1 tube) 12.8ma Gm=1000
1 tube) 13.6ma Gm=1100
Matched on Amplitrex
Vplate=180V
Vgrid=-30V
Good NOS Ma = 12.3ma
Good Gm = 1000
See more: vacuum tube
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 (1 Pair) 31 Sylvania rebranded Zenith NOS 1940's (12.8ma and 13.6ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_5dde9f32-619a-4d9e-a9fb-cdfcc923812c.jpg?v=1683736706){kind=link}
 (1 Pair) 31 Sylvania rebranded Zenith NOS 1940's (12.8ma and 13.6ma) "Pin It")