1 pair) 329A Western Electric NOS 1972 large getters, original boxes

1 tube) 33.6ma Gm=3150 (7213=1972) "D" getter halo

1 tube) 35.2ma Gm=3150 (7239=1972) "O" getter halo

Matched on Amplitrex

Vplate=180V

Vscreen=135V

Vgrid=-15V

Good Ma range 29-30ma

Good Gm range 2800-2900 

General Information

(329A=311A with a 7.5V filament)

General Information

(329A=311A with a 7.5V filament)