(!!) (BEST GE Pair) 5963 GE branded RCA NOS ribbed plates 1978 (13.0/11.4ma and 12.6/11.4ma)
(!!) (Recommended Pair) 5963 GE branded RCA NOS ribbed plates 1978 (12.0/10.8ma and 12.0/10.8ma)
(!!!) (Best Value Single) 12AU7A=6680=ECC82 AMC by RFT East Germany NOS 1970's (14.2/13.8ma)
(!!!) (Best Single 1967) ECC82=12AU7 Philips Holland NOS 1967 (11.2/10.6ma) (same Gm)
(!!!!) (Recommended Single) 12AU7=ECC82 Mullard UK ribbed plates NOS 1970 (10.4/8.6ma)(smooth rich sound)
(!!!!) (Recommended Single) 12AU7=ECC82 Mullard UK ribbed plates NOS 1963 (11.4/9.6ma) (smooth rich sound)
(!) ECC82=12AU7 Valvo Holland used/good 75-90% 1968 (7.8/9.0ma)
(!!!!) (Recommended Single) ECC82=12AU7 Telefunken Diamond Bottom ribbed plates like new 1960 (14.0/11.2ma) (Close Gm) (Highest mA and Gm)
(!!) (Best Single) 5963=12AU7 RCA NOS 1959 (12.2/12.4ma)
(!!) (Recommended Pair) 5963=12AU7 Sylvania NOS 1960's (11.0/12.2ma and 10.7/12.0ma) (close Gm)
(!!!!) (Pair - warm and smooth) 12AU7A GE NOS 1979 (7.2/7.8ma and 7.8/7.4ma) (Rogue)
(!!!) (Single) 12AU7 Philips Australia NOS 1970 era (9.6/84ma) (same internals as Holland made)
(!!!!) (Holland Single) 12AU7 Philips Holland NOS 1971 dimpled disc halo (10.2/10.6ma)
(!!!!) (Holland Single) 12AU7 Philips Miniwatt Holland like new 1961 large "O" getter halo (9.6/11ma)
(!!!) (Best Single) 12AU7A Tungsol tall ribbed plates NOS "O" getter halo 1960 era (10.8/11.4ma)
(!!!!) (Single 1964) ECC82=12AU7 Miniwatt Philips Canada NOS 1964 (9.2/9.8ma) (same build as Holland)
(!!!!) (Single 1959) ECC82=12AU7 Philips Miniwatt Holland like new low hours/tests like new 1959 (10.6/9.8ma)
