(!!!!) (Best Pair) 10 Sylvania "engraved base" 1930's NOS same build (26ma and 26.2ma)
$ 249.99
1 matched pair) 10 Sylvania "engraved base" 1930's NOS same build
1 tube) 26.0ma Gm=1900 slightly taller
1 tube) 26.2ma Gm=1700
Vplate=300V
Vgrid=-15V
Good mA range 20-30ma
Good Gm range 1700-2000
General Information
(Filament=7V @ 1.2A, Vplate=220V, Vgrid=-7V, Iplate=25ma, Mu=6, Rp=6Kohms)
(The VT-25 is built exactly the same as a VT-52, but the plate and grid are spaced differently yielding ifferent Mu factors and plate resistance)
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 (Best Pair) 10 Sylvania "engraved base" 1930's NOS same build (26ma and 26.2ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_7dbf229e-2b34-42f3-9fc0-f8cbd9ae4246.jpg?v=1727137577){kind=link}
 (Best Pair) 10 Sylvania "engraved base" 1930's NOS same build (26ma and 26.2ma) "Pin It")