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(!!) (Recommended Pair) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's (5.7ma and 5.8ma) (Highest Gm)
(!!) (Recommended Pair) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's (5.7ma and 5.8ma) (Highest Gm)
By Tube World
$ 29.99
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) 5.7ma Gm=1500
1 tube) 5.8ma Gm=1600
(Vfilament = 2.5 volts)
Amplitrex Test:
Vplate=250V
Vgrid=-13.5V
Iplate good range = 4.5-5.5ma
Gm=1400
- Inspire LP-27A
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