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(!!!!) (Best Pair) 8D8=EF86 Brimar UK quad mica NOS 1961 (2.9ma and 3.0ma) 1-2% matched
(!!!!) (Best Pair) CX-301-A Cunningham used/good 1928-1930 era (2.6ma and 2.5ma) (same Gm)
(!!!!) (Best Pair) CX-301A Cunningham and UX-201A RCA Balloon NOS 1930 era (3.1ma and 3.5ma)
(!!!!) (Best Pair) D3a=7721 Siemens Germany NOS 1978 (32.5/33ma) 1% matched
(!!!!) (Best Pair) EF89=6DA6 Telefunken Germany <> bottom NOS 1966 (8ma and 8ma) 1-2% matched
(!!!!) (Best Price) 6AU8 Sylvania NOS (4 for $9.99)
(!!!!) (Best Price) 6AU8A RCA NOS (4 for $9.99)
(!!!!) (Best Quad #1) 6SH7 GE metal can NOS 1976 (10.6, 10.6, 10.4, 10.5mA)
(!!!!) (Best Quad) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (8.8/9.5, 8.8/9.4, 9.0/9.3, 9.0/9.4mA) (Highest Gm 1-2% matched)
(!!!!) (BEST RCA PAIR) 6EU7 RCA NOS 1970 (49-51/32 and 51-52/32)
(!!!!) (Best RCA Pair) VT-229=6SL7GT RCA round black plates NOS 1942 (2.8/2.9ma and 2.5/2.6ma)
(!!!!) (Best Siemens Single) CV492=ECC83=12AX7 Siemens Halske NOS 1968 (1.2/1.5ma) (Gm=1800/1900) (phono, mic, preamp)
(!!!!) (Best Single #1) 12AX7 RCA black plates branded Westinghouse "U" getter NOS 1950's (1.1/1.4ma and Gm=1700/1800) (strong mA and Gm)
(!!!!) (Best Single #1) 12BH7A RCA NOS 1964 (13.2/12.4ma)
(!!!!) (Best Single #1) 6C10 GE rebranded RCA NOS 1960's (Ampeg / Fender) (1.3ma/1.3ma/1.0ma)
(!!!!) (Best Single #1) EC92=6AB4 Telefunken Germany <> bottom NOS 1965 (15ma) (mic)
(!!!!) (Best Single #1) EC92=6AB4 Telefunken Germany <> bottom NOS 1968 (10.6ma) (mic)
(!!!!) (Best Single #1) ECC35=6SL7GT Mullard brown base "D" getter halo NOS 1950-1955 era (3.2ma and 3.0ma)
(!!!!) (Best Single #1) JRP-12AX7 Raytheon Black Plates NOS 1962 (Gm=1700/1800) (1.5/1.6ma) (Highest mA and Gm)
(!!!!) (Best Single #1A) 6C10 RCA branded Westinghouse NOS 1971 (Ampeg / Fender) (1.4ma/2.0ma/1.5ma) (Strongest Single)
