01A National Union NOS 1940's (3.1ma)
$ 44.99
1 tube) 01A Nat. Union NOS original box (3.1ma Gm=750)
Tested on Amplitrex
Good Ma = 3ma
Good Gm = 700-800
(Filament=5V @ 250ma, Vplate max=135V)
- Crosley C5 1926
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