(!!!!) (Single 1959) ECC82=12AU7 Philips Miniwatt Holland like new low hours/tests like new 1959 (10.6/9.8ma)
(!!!!) (Single 1964) ECC82=12AU7 Miniwatt Philips Canada NOS 1964 (9.2/9.8ma) (same build as Holland)
(!!!!) (SINGLE) 12AU7A GE NOS 1963 copper grid posts (8.9/10.2ma)
(!!!!) (SINGLE) 12AU7A GE NOS 1972 copper grid posts (10.6/9.8ma) (warm and smooth)
(!!!!) (SINGLE) 12AU7A GE NOS 1976 copper grid posts (9.4/8.8ma)
(!!!!) (Single) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (9.8/8.6ma)
(!!!!) (Single) ECC82=12AU7 Philips Miniwatt Holland "O" getter 1965 (11.5/12.0ma)
(!!!!) (Slightlly microphonic single) JAN-CHS-12AU7 Sylvania "black plates" with "D" getter halo NOS 1951 (9.2/9.8ma)
(!!!!) (Slightlly microphonic single) JAN-CHS-12AU7 Sylvania "black plates" with "D" getter halo NOS 1951 (9.8/10ma)
(!!!) (Best 5-Star) 5814A=12AU7 GE Electronic Secretary "5 STAR" triple mica NOS 1960 (10.8/10.4ma) (Same Gm)
(!!!) (Best pair #3) 12AU7A GE NOS 1958-1965 (10/10.6 and 10/11.6ma) (close Gm)
(!!!) (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 1954) 5814A=12AU7 GE "5 Star" triple mica NOS 1954 (10.2/10.8ma)
(!!!) (Best Single 1960) 5814A=12AU7 GE "5 STAR" triple mica NOS 1960 (10.0/10.4ma) 1-3% section balance
(!!!) (Best Single 1961) ECC82=12AU7 Miniwatt Holland NOS 1961 (9.8/9.2ma)
(!!!) (Best Single 1967) ECC82=12AU7 Philips Holland NOS 1967 (11.2/10.6ma) (same Gm)
(!!!) (Best Single) 12AU7A RCA clear top NOS 1964 (8.4/8.6ma) (same Gm)
