(!!!!) (Best Pair) JAN-6189=12AU7WA Sylvania NOS 1972-1973 (9.3/10.4ma and 9.6/10.6ma) 1-3% matched
(!!!!) (Recommended Pair) JAN-6189W=12AU7WA Sylvania NOS 1973-1974 (9.2/9.6ma and 9.8/8.6ma)
(!!!) (Best Single 1965) JHS-12AX7WA Sylvania NOS 1965 (1.3/1.5ma and Gm=1700/1800)
(!!!) (Best Single) 12AX7A Sylvania NOS 1960's (Gm=2600/2400)
(!!!) (Best Single) JHS-5670 Sylvania NOS 1966 (12/10ma)
(!!!) (Good Value Single) JAN-6189=12AU7WA Sylvania NOS 1960 era in white box (8.6/10ma)
(!!!) (Recommended Single) 12AX7A Sylvania NOS 1970's (Gm=2500/2800 and 2.2/2.7ma)
(!!!) (Single) JHS-5670 Sylvania NOS 1966 (7.0/6.8ma)
(!!!) JHS-6189=12AU7WA Sylvania NOS 1966 in white box (8.5/10.2ma)
(!!!) JHS-6189=12AU7WA Sylvania NOS 1966 in white box (9.6/11.4ma)
(!!) (Good Value) 12AX7A/7025 Sylvania used/good 1970's (Gm=2300/1900)
(!!) 12AX7A/7025 Sylvania branded RCA NOS 1970's (Gm=2100/2000)
(!) JHS-0A2WA Sylvania used/test like new 1966 (1 pair)
