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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
Ships within 48 hours · Estimated delivery Jun 22 - Jun 27
US$40
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