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(!!!!) (Best Single #2) 12AT7=ECC81 Mullard branded Raytheon NOS 1972 (9.2/9.2ma)
(!!!!) (Best Single #2) 12AU7=ECC82 Mullard UK shield logo NOS 1965 (11.2/12.6ma) (smooth rich sound)
(!!!!) (Best Single #2) 12BH7A RCA NOS 1963 (10.6/11.6ma)
(!!!!) (Best Single #2) 6SN7GTB RCA NOS 1957-1958 (8.8/9.6ma)
(!!!!) (Best Single #2) ECC33=6SN7GT Mullard black plates platter getter halo NOS 1950-1955 (10.2/12.2ma)
(!!!!) (Best Single #2) ECC802S=12AU7 Telefunken Germany <> bottom NOS 1960 good printing (10.4ma and 11.0ma) (close Gm) (oldest single)
(!!!!) (Best Single #2) ECC803S=12AX7 Telefunken Qualitex Ulm Germany <> bottom like new 1964 (1.3/1.5ma and Gm=1600/1800)
(!!!!) (BEST SINGLE #2) JG-12AT7WA=6201 GE NOS "blue tip - red dot" triple mica, "O" getter halo, gray plates 1960 (7.7/7.8ma) 1-2% section balance
(!!!!) (Best Single #3) 6C10 RCA branded Westinghouse NOS 1971 (Ampeg / Fender) (1.0ma/2.1ma/1.6ma) (2nd Strongest Single)
(!!!!) (Best Single #3) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (12.0/10.2ma)
(!!!!) (Best Single #3) EC92=6AB4 Telefunken Germany <> bottom NOS 1965 (8.2ma) (mic)
(!!!!) (Best Single #3) EF86 Telefunken Germany <> bottom NOS gray shield 1972 (2.8ma) (Neumann, Lawson, Soundelux, Manley)
(!!!!) (BEST SINGLE #3) JG-12AT7WA=6201 GE NOS "blue tip - red dot" triple mica, "O" getter halo, gray plates 1960 (8.6/11.8ma)
(!!!!) (Best Single #4) EC92=6AB4 Telefunken Germany <> bottom NOS 1969 (8ma) (mic)
(!!!!) (Best Single 1941-1945) VT-231=6SN7GT RCA gray coated glass copper grid posts 1941-1945 (9.6/9.8ma)
(!!!!) (Best Single 1944) 6SL7GT Sylvania round black plates NOS 1944 (same build as VT-229) (2.1/2.3ma)
(!!!!) (Best Single 1953) 12BH7 Sylvania Motorola black oval plates "D" getter like new 1953 (14.6/13.8ma) (High mA and Gm)
(!!!!) (Best Single 1956) 12AX7 GE Motorola tall gray ribbed plates "U" getter 1956 like new (Gm=1700/2000 and 1.6/2.1ma)
(!!!!) (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 Single 1958) 12AX7 GE tall gray ribbed plates "U" getter 1958 like new (Gm=1800/1800 and 1.3/1.3ma) 1% section balance
