(!!!) (Best Single) 311B Western Electric NOS 1956 (31.6ma)
$149.99
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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
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