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(!!!!) (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) 12AU7WA=6189 RT Radio Technique France NOS 1961 (10.6/10.2ma) (High Gm)
(!!!) (Best Value Single) 12AU7A=6680=ECC82 AMC by RFT East Germany NOS 1970's (13.0/11.4ma)
(!!!) (Best Value) 12AU7=ECC82 Daystrom Mullard UK ribbed plates like new 1963 (9.0/10.2ma) (162 series) (smooth presentattion)
(!!!) (Best Value) 12AU7=ECC82 Daystrom Mullard UK ribbed plates used/good 1960 (8.0/8.4ma) (161 series) (smooth presentattion)
(!!!) (Single) 12AU7WA Tungsram ERA tall tibbed plates NOS 1970's (10.8/9.6ma)
- more pairs listed soon (!!!!) (Best Pair #1) 12AU7WA=6189 RT Radio Technique France NOS 1961 (9.9/10ma and 9.4/9.2ma) (same Gm)
