(!!) (~ Best Value Pair ~) 56 Sylvania test like new 1940's (5.3ma and 5.5ma)
$ 19.99
1 pair) 56 Sylvania test like new 1940's same build in white boxes
1 tube) 5.5ma Gm=1500 Sylvania rebranded Philco
1 tube) 5.3ma Gm=1400 Sylvania lightning logo 1946 a little less carbon on top and bottom of plate
Matched on Amplitrex:
Vplate=250V
Vgrid=-13.5V
Iplate good range = 4.5-5.5ma
Gm=1400
See more: vacuum tube
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 (~ Best Value Pair ~) 56 Sylvania test like new 1940's (5.3ma and 5.5ma) "Pin It")