(!!!) (Best Single) 7247=12DW7 Mullard UK rebranded RCA NOS 1972 (1.6ma and 14.5ma)

7247=12DW7 Mullard UK rebranded RCA NOS 1972

12AX7 Section = 1.6ma Gm=1900 (very strong)

12AU7 Section = 14.5ma Gm=2400 (very strong)

Tested on Amplitrex

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

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