(!!) (Recommended Single) 311B Western Electric NOS 1967 glass slightly tilted, large getter, in white box (33ma)
$139.99
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311B WE NOS (6739=1967) glass slightly tilted, large getter, in white box 33ma Gm=3100 Tested on Amplitrex Vplate=180V Vscreen=135V Vgrid=-15V Good Ma = 30ma Good Gm = 2900
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