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(!!!) (Best Single #2) 7247=12DW7 Mullard UK rebranded RCA NOS 1969 (1.2ma and 9.2ma) (Copy)
(!!!) (Best Single #2) E88CC=6922 Siemens Halske Germany NOS 1962 (13.6/14.6ma) 1-5% section balance
(!!!) (Best Single #2) ECC81=12AT7 Telefunken Germany <> bottom NOS 1965 (9.8ma/12ma) (recommended for mic)
(!!!) (Best Single #3) 6SN7GTB Sylvania NOS 1960 era (8.6ma and 7.6ma)
(!!!) (Best Single 1953) 12AX7 GE gray ribbed plates "D" getter 1953 like new (Gm=1600/1600 and 1.1/1.0ma) (1st version)
(!!!) (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 1956) 12BH7A GE gray oval plates NOS "U" getter 1956 (10/9.8ma)
(!!!) (Best Single 1962) JHS-12AX7 Sylvania NOS 1962 (Gm=2600/2500 and 1.8/1.9ma)
(!!!) (BEST SINGLE 1964) AFLC-12AX7WA Sylvania NOS 1964 (Gm=1900/1900)
(!!!) (Best Single 1965) JHS-12AX7WA Sylvania NOS 1965 (1.3/1.5ma and Gm=1700/1800)
(!!!) (Best Single E90F=6BH6 Philips Holland NOS 1963 (10.2ma)
(!!!) (Best Single from 1951) 12SN7GT GE parallel black ribbed plates 1951 (7.6/8.4ma)
(!!!) (Best Single) 127 Arcturus Blue Balloon tests like new 1930 era in white box (5.6ma) (High Ma and Gm)
(!!!) (Best Single) 12AT7=ECC81 Siemens Halske Germany branded Telefunken NOS 1961 (12.2ma/10ma)
(!!!) (Best Single) 12AU7A Tungsol tall ribbed plates NOS "O" getter halo 1960 era (10.8/11.4ma)
(!!!) (Best Single) 12AX7A Sylvania NOS 1970's (Gm=2800/2900)
(!!!) (Best Single) 12AZ7 Tungsol black plates "D" getter halo NOS 1955 (12ma/14ma)
(!!!) (Best Single) 26 RCA ST-14 tests like new 1952 (8.5ma)
(!!!) (Best Single) 2C51=5670 Sylvania NOS 1970's (8.8/8.4ma)
(!!!) (Best Single) 311B Western Electric NOS 1956 (31.6ma)
