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(!) 448A Western Electric smooth top used/good 1971 (1 pair: 28ma and 29.4ma) (Matched on Amplitrex)
(!) 448A Western Electric smooth top used/good 1971 (1 pair: 28ma and 29.4ma) (Matched on Amplitrex)
$ 79.99
1 pair) 448A Western Electric smooth top "D" getter halos used/good - reboxed
1 tube) 28.0ma Gm=24,000 faded top getter
1 tube) 29.4ma Gm=24,200 good top getter
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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 448A Western Electric smooth top used/good 1971 (1 pair: 28ma and 29.4ma) (Matched on Amplitrex)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_e689909b-7223-4cb9-bb85-287039570a4a.jpg?v=1571439120){kind=link}
 448A Western Electric smooth top used/good 1971 (1 pair: 28ma and 29.4ma) (Matched on Amplitrex) "Pin It")