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(!!!) (#1 311B PAIR) 311B Western Electric NOS 1964 and 1974 (35ma and 35.5ma)

(!!!) (#1 311B PAIR) 311B Western Electric NOS 1964 and 1974 (35ma and 35.5ma)

$ 288.88

1 pair) 311B WE NOS in white boxes

1 tube) 1964 NOS D getter halo (35ma) Gm=3050

1 tube) 1975 NOS O getter halo (35.5ma) Gm=3150

 

Tested on Amplitrex

Vplate=180V

Vscreen=135V

Vgrid=-15V

Good Ma = 30ma

Good Gm = 2900

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