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(!!!!!) (BEST PAIR #1) 12AU7=ECC82 Telefunken Germany smooth plates NOS 1968 fair printing (9.0/9.8ma and 10/8.8ma) (Same Gm) 1-3% matched
(!!!!!) (Best Pair #1) ECC82=12AU7 Philips Holland 1969 same date codes (11.0/11.5ma and 11.4/11.2ma) (sweet sound) 1-3% matched
(!!!!!) (Best Single #1) 12AU7 Philips Holland NOS 1968 "O" halo (11.2/12.2ma) (same Gm) (sweet sound)
(!!!!!) (Best Single #2) 12AU7 Philips Holland NOS 1972 dimpled disc getter (10.8/11.5ma) 1-5% section balance
(!!!!!) (Holland Single) 12AU7 Pope Holland NOS 1971 dimpled disc halo (12/13.4ma)
(!!!!!) (Nice Single) ECC82=12AU7 Telefunken Germany <> bottom ribbed plates used/good 1957 (8.5/8.2ma) (strong Gm)
(!!!!) (Best Pair #1) 12AU7WA=6189 RT Radio Technique France NOS 1961 (9.2/9.2ma and 9.2/9.0ma) 1-2% matched
(!!!!) (Best Pair #1) 12AU7WA=6189 RT Radio Technique France NOS 1961 (9.4/9.0ma and 9.2/9.2ma) (close Gm) 1-3% matched
(!!!!) (Best Pair #3) 12AU7WA=6189 RT Radio Technique France NOS 1961 (8.4/9.2ma and 8.4/9.0ma) 1-3% matched
(!!!!) (Best Single #1) 12AU7=ECC82 Mullard UK shield logo NOS 1965 (11.2/12.6ma) (smooth rich sound)
(!!!!) (Best Single 1956) ECC82=12AU7 Siemens Halske "Long Ribbed Plates" and large/wide "U" getter branded Haltron 1956 (10/9.2ma) (k62 series) (High Gm) (rare)
(!!!!) (Best Value Single) 12AU7 Philips Miniwatt Holland like new 1961 large "O" getter halo (9.6/11ma)
(!!!!) (Best Value Single) ECC82=12AU7 Telefunken Germany <> Bottom ribbed plates NOS 1969 faded printing (10.8/10.0ma) (Highest Gm)
(!!!!) (Good Single 1950) 12AU7 Sylvania black plates "D" getter NOS 1950 (11/12.8ma)
(!!!!) (Single) 12AU7 RCA Italy ribbed plates NOS 1960's (8/10.6ma)
(!!!!) (Single) 12AU7=ECC82 Mullard branded Philips NOS 1973 (11.2/12.0ma) (smooth and rich tone)
(!!!!) (Single) ECC82=12AU7 Mullard BVA UK NOS ribbed plates 1967 in Kradlepack box (9.2/9.4ma)
(!!!!) (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)
(!!!!) (slightly microphonic single) ECC82=12AU7 Telefunken Diamond Bottom smooth plates NOS 1961 very good printing (10.0/10.8ma) (high Gm)
