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(!) 448A Western Electric smooth top used/good

(!) 448A Western Electric smooth top used/good "D" getter halo 1963-1970 (1 pair: 35ma and 36.5ma) (Matched on Amplitrex)

$ 129.99

1 pair) 448A Western Electric smooth top used/good 1963-1970 - reboxed

1 tube) 35.0ma Gm=26,000

1 tube) 36.5ma Gm=28,700

 

Amplitrex Test Data:

Vplate=135V

Vscreen=135V

Vgrid=-2

Good Ma range 20-30ma

Good Gm = 23,000 - 27,000

 

DIY pentode

See more: vacuum tube
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