(!!) 7247=12DW7 GE branded Tungsol tall gray ribbed plates NOS 1960's (1.0ma and 10.4ma)

7247=12DW7 GE branded Tungsol tall gray ribbed plates NOS 1960's

12AX7 Section = 1.0ma Gm=1500

12AU7 Section = 10.4ma Gm=2100

Tested on Amplitrex

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

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