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(!!) (#3 56 Sylvania Pair) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's one tube has slightly tilted glass (5.2ma and 5.5ma)
(!!) (#3 56 Sylvania Pair) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's one tube has slightly tilted glass (5.2ma and 5.5ma)
By Tube World
$ 24.99
1 pair) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's original boxes, 4 metal prongs on top mica, same internals
1 tube) 5.2ma Gm=1400
1 tube) 5.5ma Gm=1500 slightly tilted glass - see photo
(Vfilament = 2.5 volts)
Amplitrex Test:
Vplate=250V
Vgrid=-13.5V
Iplate good range = 4.5-5.5ma
Gm=1400
- Inspire LP-27A
See more: vacuum tube
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 (#3 56 Sylvania Pair) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's one tube has slightly tilted glass (5.2ma and 5.5ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/56p3.jpg?v=1571439260){kind=link}
 (#3 56 Sylvania Pair) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's one tube has slightly tilted glass (5.2ma and 5.5ma) "Pin It")