(!!!) (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 GE) JG-5814 GE NOS "square getter halo" and "short wide ribbed dark gray plates" 1953 in white box (9.6/10ma) 1-3% section balance
(!!!) (Recommended Pair) JAN-6189=12AU7WA Sylvania NOS 1973-1974 (8.4/9.8ma and 9.2/9.6ma)
(!!!) (Recommended Single) 12AU7A GE NOS 1963 (8.6/9.5ma)
(!!!) (Recommended Single) 12AU7A RCA clear top used/like new "D" getter halo 1960's (9.0/10.8ma)
(!!!) (Recommended Single) 5814A GE "5 STAR" with "O" getter halo 1963 (10/14ma)
(!!!) (Recommended Single) JAN-5814A RCA black plates NOS 1966 (9.8/11.4ma)
(!!!) (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)
(!!!) 12AU7 EICO Holland used/good 1961 (8.0/9.6ma)
(!!!) 12AU7WA Mullard branded Chelmer Valve used/good 1961 (7.7/8.8ma)
(!!!) 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)
(!!) (Best Single) 12AU7A Westinghouse gray plates "O" getter halo 1960's NOS (10.6/11.2ma)
(!!) (#1 12AU7 Raytheon from 1954) 12AU7 Raytheon gray ribbed plates "D" getter halo NOS 1954 (10.6/11.2ma)
(!!) (#1 12AU7 Raytheon from 1956) 12AU7 Raytheon gray ribbed plates super large "U" getter halo NOS 1956 (10.4/10.8ma) (High Ma and Gm)
(!!) (#1 12AU7A Raytheon 1960's single) 12AU7A Raytheon Uniline gray ribbed plates "O" getter NOS 1960's (8.2/11ma)
(!!!!) (Best Pair) GB-5814A Sylvania Gold Brand Gold Plins NOS 1960's (9.8/9.2ma and 9.4/9.6ma) (same Gm)
(!) (Single) 5963=12AU7 GE NOS 1960's (11.6/11.8ma)
(!!) (Best Pair) 5963=12AU7 Sylvania NOS 1960's (11.2/10.4ma and 11.2/10.6ma)