(!!!) (Best Single) 311B Western Electric NOS 1956 (31.6ma)
By Tube World
$ 149.99
311B Western Electric NOS (5652=1956) original box
31.6ma
Gm=3000
Tested on Amplitrex
Vplate=180V
Vscreen=135V
Vgrid=-15V
Good Ma = 30ma
Good Gm = 2900
See more: vacuum tube
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 (Best Single) 311B Western Electric NOS 1956 (31.6ma) "Pin It")