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(!!!!) (Best Single) EZ81=6CA4 Philips Australia NOS 1974 (58/40 and 58/40) (similar sound to EZ81 Holland) 1% section balance
(!!!!) (Read Review) 12AX7A=ECC83 Matsushita Japan NOS rebranded Raytheon NOS 1970 era (Gm=1800/1800 and 1.5/1.3ma) (similar to Mullard)
(!!!!) (Recommended Pair) 5842=417A Amperex "PQ" USA Nickel Pins "O" getter halo NOS 1985 (35ma and 37ma)
(!!!!) (Recommended Single 1959) 12AU7 Mullard Heath UK long plates "O" getter used/good 1959 (8.8/9.0ma)
(!!!!) (Recommended Single) 6DJ8 Philips Miniwatt Holland NOS 1960 era large "O" getter halo (18.0/19.4ma)
(!!!!) (Recommended Single) PCC88=7DJ8 Mullard Holland NOS 1973 (11.5/13.8ma)
(!!!!) (Single) 12AT7 Philips by Mullard UK NOS 1965 (14.3/8.5ma)
(!!!!) (Single) 12BH7A GE gray oval plates NOS mid-1960's (11.5/16ma)
(!!!!) (slightly microphonic pair) E182CC=7119 Philips Miniwatt SQ Holland NOS large "O" getter halo 1962 (35/36ma and 36/34ma)
(!!!) (2nd Best Pair) 311B Amperex made in Russia NOS 1977 (31.8ma and 33.2ma) (very good construction)
(!!!) (Best Overall Single) E90F=6BH6 Philips SQ Holland NOS 1968 (8.4ma)
(!!!) (Best Pair #2) E182CC=7119 Amperex and Philips Miniwatt SQ Holland NOS "O" getter halo 1962-1967 (38ma/36ma and 36/35ma)
(!!!) (Best Pair #3) E182CC=7119 Amperex and Philips Miniwatt SQ Holland NOS "O" getter halo 1962-1966 (36ma/43ma and 43/37ma)
(!!!) (Best Pair) 6HA5=6HM5=EC900 Amperex Holland "Globe Logo" NOS in white boxes 1971-1972 (12.0ma and 12.8ma)
(!!!) (BEST PAIR) 7247=12DW7 CBS gray ribbed plates NOS 1960 (0.9/8.8ma and 0.9/8.6ma) 1-3% matched
(!!!) (Best Value Single #3) 6267=EF86 RFT East Germany branded Telefunken 1964 (2.3ma)
(!!!) (Best Value) 12AT7 Mullard UK NOS 1969 (9.4/7.6ma)
(!!!) (READ REVIEW) 6922 US Navy Amperex and Amperex branded RCA USA NOS 1963-1964 (18.8/17.6ma and 18.5/20.2ma) (close Gm matching) (Audio Research, Nova, CAT, CJ, Lab 12)
(!!!) (Recommended Pair) 311B Amperex made in Russia NOS 1977 (37.2ma and 38.5ma) (Highest mA and Gm)
(!!!) (Recommended Pair) 6HA5=6HM5=EC900 Amperex Holland "Globe Logo" NOS in white boxes 1971-1972 (10.4ma and 10.6ma)
