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(!!!) (BEST PAIR) JG-6189=12AU7WA GE double mica NOS 1963-1964 (10.2/12ma and 10.2/11ma)
(!!!) (BEST PRICE) 12AU7A GE used/good 1969 - 1980 (4 for $29.99)
(!!!) (BEST PRICE) 12AU7A GE used/good 1971 - 1978 (4 for $29.99)
(!!!) (Best Single 1953) JG-5814 GE NOS "square getter halo" and "short wide ribbed dark black plates" 1953 in white box (11.0/12.5ma)
(!!!) (Best Single) 12AU7A RCA clear top NOS 1964 (8.4/8.6ma) (same Gm)
(!!!) (Best Single) 12AU7A Tungsol tall ribbed plates NOS "O" getter halo 1960 era (10.8/11.4ma)
(!!!) (Best Single) 12AU7WA=6189 Sylvania NOS 1960's (10/10ma) 1-2% section balance
(!!!) (Best Value Single 1958) 12AU7=ECC82 Brimar made for Arkay England ribbed plates 1958 (8.2/10.8ma)
(!!!) (Best Value Single) 5814A GE 5 STAR "O" getter NOS 1960's faded printing (9.6/11.8ma)
(!!!) (Best Value Single) CV4003=12AU7 RFT East Germany NOS 1974 (12.2/12.8ma)
(!!!) (Best Value) 12AU7=ECC82 Daystrom Mullard UK ribbed plates like new 1963 (11.6/10.2ma) (162 series) (smooth presentattion)
(!!!) (Best Value) 12AU7=ECC82 Daystrom Mullard UK ribbed plates like new 1963 (9.0/10.2ma) (162 series) (smooth presentattion)
(!!!) (Good Value Pair) 12AU7A RCA clear top used/good 1960's (7.5/9.6ma and 7.5/9.2ma)
(!!!) (Good Value Single) 12AU7 EICO Holland used/good 1961 (8.0/9.6ma)
(!!!) (Good Value Single) 12AU7 Philips Australia NOS 1970 era (9.6/8.8ma) (same internals as Holland made)
(!!!) (Good Value Single) JAN-6189=12AU7WA Sylvania NOS 1960 era in white box (8.6/10ma)
(!!!) (Good Value) JG-5814A GE triple mica "U" getter halo like new 1955 in white box (8.8/9.6ma)
(!!!) (Recommended Black Plates) 12AU7A Westinghouse black plates 1960 era rebranded United 1981 "D" getter halo (8.4/9.8ma) (similar to RCA black plates)
(!!!) (Recommended Pair) 12AU7A GE NOS 1965-1975 (8.8/8.8ma and 9.2/8.8ma) (Same Gm) (smooth and warm)
(!!!) (Recommended Pair) 5963 gray plates NOS 1967-1973 (9.4/9.09ma and 8.4/9.0ma)
