(!!) 6AN8A Sylvania branded National U getter NOS 1960 era (16.6/15ma)

6AN8A Sylvania branded National U getter NOS 1960 era

16.6ma Gm=4800

15.0ma Gm=7000

Tested on Amplitrex

Good Ma/Gm (triode) = 13-15ma and Gm= 3700-4300

Good Ma/Gm (pentode) = 11-12ma Gm=7000-7500