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(!) 448A Western Electric smooth top used/strong 1965-1970 (1 pair: 37ma and 37.5ma) (Matched on Amplitrex)

(!) 448A Western Electric smooth top used/strong 1965-1970 (1 pair: 37ma and 37.5ma) (Matched on Amplitrex)

$ 109.99

1 pair) 448A Western Electric smooth top used/strong 1965 and 1970 - reboxed

1 tube) 37.5ma Gm=22,200

1 tube) 37.5ma Gm=22,000

 

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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