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  • (!!!) (Best Pair #3) 448A Western Electric tipped top used/good 1965-1966 (28ma and 29.2ma) (same Gm)
(!!!) (Best Pair #3) 448A Western Electric tipped top used/good 1965-1966 (28ma and 29.2ma) (same Gm) Image 1
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(!!!) (Best Pair #3) 448A Western Electric tipped top used/good 1965-1966 (28ma and 29.2ma) (same Gm) Nav Image 1

(!!!) (Best Pair #3) 448A Western Electric tipped top used/good 1965-1966 (28ma and 29.2ma) (same Gm)

$93.00 $109.99


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1965 1966 448A all pentode preamp tubes wp


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Western Electric
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  • Description

1 pair) 448A Western Electric "tipped top" used/good "D" getter halo in white boxes

1 tube) 28.0ma Gm=26,000 (6613=1966)

1 tube) 29.2ma Gm=26,000 (6526=1965)

 

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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