(!!) (Best Value Single) 12AX7 EI Yugoslavia Smooth Plate TELEFUNKEN copy NOS 1979 (1.0/1.2ma and Gm=1800/1900)
(!!) (Best Value Single) 12AX7 EI Yugoslavia Smooth Plate TELEFUNKEN copy NOS 1979 (1.9/1.2ma and Gm=2400/1800)