(!!!) (Best Pair #1) 448A Western Electric tipped top used/like new 1965-1966 (32.6ma and 31.8ma) (close Gm matching)

1 pair) 448A WE "tipped top" used/tests like new D getter halo 1965-1966 reboxed

1 tube) 32.6ma Gm=28,700

1 tube) 31.8ma Gm=28,100

Amplitrex Test Data:

Vplate=135V

Vscreen=135V

Vgrid=-2

Good Ma range 20-30ma

Good Gm = 23,000 - 27,000

DIY pentode