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448A WE

448A WE "tipped top" used/tests like new D getter halo 1965-1966 reboxed (1 Pair: 30ma and 31.8ma)

$ 139.99

1 pair) 448A WE "tipped top" used/tests like new D getter halo 1965-1966 reboxed

1 tube) 30.0ma Gm=26,800 1965

1 tube) 31.8ma Gm=26.600 1966

 

Amplitrex Test Data:

Vplate=135V

Vscreen=135V

Vgrid=-2.5V

Good Ma range 18-25ma

Good Gm = 25,000

 

DIY pentode

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