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(!!!) (Best Pair #4) 448A Western Electric tipped top used/tests like new 1965 (26.4ma and 26.8ma)
(!!!) (Best Pair #4) 448A Western Electric tipped top used/tests like new 1965 (26.4ma and 26.8ma)
$ 109.99
1 pair) 448A Western Electric "tipped top" used/tests like new D getter halo 1965 in white boxes
1 tube) 26.4ma Gm=26,900
1 tube) 26.8ma Gm=25,500
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 Pair #4) 448A Western Electric tipped top used/tests like new 1965 (26.4ma and 26.8ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_efc14a6b-8068-49fe-a5b4-4e05c431e9bd.jpg?v=1737822076){kind=link}
 (Best Pair #4) 448A Western Electric tipped top used/tests like new 1965 (26.4ma and 26.8ma) "Pin It")