(!!!!!) (Best Value Single) 12AX7 IEC Mullard UK NOS 1965 copper grid posts (0.7/1.2ma and Gm=1400/1700)
(!!!!!) (Best Value Single) 12AX7 Mullard branded "M" UK used/good 1961 copper grid posts (0.7/.8ma and Gm=1400/1500) (161 series)
(!!!!) (Best Value Single) 12AX7=ECC83=7025 IEC Mullard ribbed plates used/good 1965 (1.0/1.2ma and Gm=1600/1800)
(!!!!) (Recommended Single) 12AX7 Amperex Bugle Boy Holland 1961 used/tests like new faded printing (1.1/1.4ma and Gm=1700/1700)
(!!!!) (Recommended Single) 12AX7 Amperex Bugle Boy Holland like new 1965 (0.9/1.1ma and Gm=1500/1700)
(!!!) (Best 7025 Sylvania) 7025 Sylvania NOS 1960's (Gm=2800/3000)
(!!!) (Recommended Single) 7025 Sylvania NOS 1960's (Gm=2300/2300)
(!!!) (Recommended Single) 7025 Sylvania NOS 1960's (Gm=2500/2700)
(!!!) 7025 RCA gray plates used/good 1960's - 1970 (.9/.9mA and Gm=1400/1500)
(!!) 7025 Westinghouse gray pinched plates "D" getter NOS 1963 (Gm=1550/1550)
(!!) 7025 Westinghouse gray pinched plates "D" getter NOS 1963 (Gm=1600/1700)
(!) 12AX7A RCA used/good 1960's (Gm=1300/1500)
