6AN8A GE Great Britain made in Japan NOS 1976 (13/19ma)

6AN8A GE Great Britain made in Japan NOS by Toshiba

13ma Gm=3800 triode

19ma Gm=9800 pentode

Tested on Amplitrex

Good used Ma/Gm (triode) = 10-12ma and Gm= 3300-4000

Good used Ma/Gm (pentode) = 9-10ma Gm=6500-7000