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(!) 448A Western Electric smooth top used/strong 1966-1970 (1 pair: 37ma and 40.5ma) (Matched on Amplitrex)
(!) 448A Western Electric smooth top used/strong 1966-1970 (1 pair: 37ma and 40.5ma) (Matched on Amplitrex)
$ 99.99
1 pair) 448A Western Electric smooth top used/strong 1966 and 1970 - reboxed
1 tube) 37.9ma Gm=27,600
1 tube) 40.5ma Gm=26,800
Amplitrex Test Data:
Vplate=135V
Vscreen=135V
Vgrid=-2
Good Ma range 20-30ma
Good Gm = 23,000 - 27,000
DIY pentode
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