1 matched pair) 403B Western Electric NOS "D" getter 1969 original boxes

1 tube) 5.5ma Gm=4200

1 tube) 5.3ma Gm=4200

Matched on Amplitrex

Vplate=180V

Vscreen=120V

Vgrid=-2V

Good Iplate = 5.5 - 7ma

Good Gm = 4000-5100

Recommended for

- Little Dot Mk3

- Little Dot Mk4 SE

- Grant Fidelity tube buffer

- CAD Trion tube microphone

- Miniwatt EL84 amp

- Grant Fidelity B283

- Darkvoice 332

- Yaqin CD 2