(!) 448A Western Electric smooth top used/strong 1965-1970 (1 pair: 37ma and 37.5ma) (Matched on Amplitrex)
$99.99
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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
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