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(!!!) (Best tipped top pair) 448A Western Electric tipped top used/tests like new 1965 (35.5ma and 36.4ma) (Matched on Amplitrex)
(!!!) (Best tipped top pair) 448A Western Electric tipped top used/tests like new 1965 (35.5ma and 36.4ma) (Matched on Amplitrex)
$ 149.99
1 pair) 448A Western Electric "tipped top" used/tests like new D getter halo 1965 in white boxes
1 tube) 35.5ma Gm=27,300
1 tube) 36.4ma Gm=27,900
Amplitrex Test Data:
Vplate=135V
Vscreen=135V
Vgrid=-2.5V
Good Ma range 18-25ma
Good Gm = 25,000
DIY pentode
See more: vacuum tube
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 (Best tipped top pair) 448A Western Electric tipped top used/tests like new 1965 (35.5ma and 36.4ma) (Matched on Amplitrex) "Pin It")