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(!!) (#1 448A Pair) 448A Western Electric smooth top used/test like new 1965-1968 (42.5ma and 45.5ma) (Matched on Amplitrex)

(!!) (#1 448A Pair) 448A Western Electric smooth top used/test like new 1965-1968 (42.5ma and 45.5ma) (Matched on Amplitrex)

$ 149.99

1 pair) 448A Western Electric smooth top used/test like new 1965-1968 - reboxed

1 tube) 45.5ma Gm=29,700

1 tube) 42.5ma Gm=30,500

 

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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