(!!!) (Recommended Pair) 311B WE used/good 1960-1961 partially faded getters (24.5ma and 26.5ma)

1 pair) 311B WE used/good 1960-1961 in white boxes

1 tube) 26.5ma Gm=2500 (6152=1961)

1 tube) 24.5ma Gm=2400 (6052=1960)

Tested on Amplitrex

Vplate=180V

Vscreen=135V

Vgrid=-15V

Good Ma = 30ma

Good Gm = 2900