(!!!) (Best Pair #2) 448A Western Electric tipped top used/test like new 1965 (34ma and 35ma)

1 pair) 448A WE “”tipped top”” used/tests like new D getter halo 1965 reboxed

1 tube) 35ma Gm=26,000

1 tube) 34ma Gm=28,000 slightly taller bottle

Amplitrex Test Data:

Vplate=135V

Vscreen=135V

Vgrid=-2

Good Ma range 20-30ma

Good Gm = 23,000 – 27,000

DIY pentode