(!!!) (Best Pair) 56 Sylvania black plate NOS 1943 (6.3ma and 6.2ma)
By Tube World
$ 31.99
Sorry, this product is sold out!
1 pair) VT-56 Sylvania black plate NOS 1943 original boxes, 4 metal prongs on top mica, same internals
1 tube) 6.3ma Gm=1600
1 tube) 6.2ma Gm=1500
(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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