(!!) 7247=12DW7 GE branded Tungsol tall gray ribbed plates used/good 1960 era (1.0ma and 7.8ma)

7247=12DW7 GE branded Tungsol tall gray ribbed plates used/good 1960 era “”U”” getter

12AX7 Section = 1.0ma Gm=1500

12AU7 Section = 7.8ma Gm=1700

Tested on Amplitrex

12AX7 Section NOS Good = 1-1.2ma Gm=1500-1600

12AU7 Section NOS Good = 8-10ma Gm=1800-2200