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6AK5 Westinghouse NOS 1970 (6.6ma)
(!!!) (Best Pair) 12AT7 RCA gray plates NOS 1972-1974 (9.2/8.6ma and 9.6/8.4ma)
(!!!) (#1 19J6 Pair) 19J6 RCA "U" getter halo NOS 1952 same date codes
(!!!) (#1 286A) 286A Western Electric "top printing" NOS 1942-1945 (7.0ma)
(!!!) (Best Pair #3) 448A Western Electric tipped top used/strong 1965 (30ma and 32ma) (Matched on Amplitrex)
(!!!) (#1 56 National Union Pair) 56 National Union rebranded Western Electronics NOS 1940's (5.0ma and 5.2ma)
(!!!) (Single) 5755=420A Western Electric clear top tests like new 1952 (1.6ma/1.7ma)
(!!!!) (Best Single 1958) 6922 Amperex Holland curved "D" getter 1958 NOS (16.2/17.8ma) (same sonics as pinched waist version)
(READ REVIEW) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 (11.5/9.6ma and 12.2/9.5ma) (best sound)
(!!!) (#1 6BX7GT RCA single) 6BX7GT RCA NOS 1961 (41/48ma)
(!!!) (Best Pair #2) EC92=6AB4 Telefunken Germany <> bottom NOS 1965-1969 (7.5/7.8ma) (mic)
(!!!) (Recommended Pair) 6DJ8 GE NOS coated glass 1975-1978 (19.8/19.2ma and 17/19.8ma) (smooth and warm)
(!!!) (Recommended Pair) 6DJ8=ECC88 Telefunken Germany <> bottom NOS branded Valvo 1960's (12/12.8ma and 13.8/12.6ma)
(!!!) (Best Value) 12AU7=ECC82 Daystrom Mullard UK ribbed plates like new 1963 (11.6/10.2ma) (162 series) (smooth presentattion)
(!!!) (Best Pair) 12A Sylvania green leaf NOS 1940's original boxes (7.5ma and 7.9ma)
(!!!) (#2 19J6 Pair) 9J6 RCA NOS 1950's - 1960's same internal plate structure, different getter halo shape
(!!!) (Best Single) 5755=420A Western Electric clear top NOS 1958 (2.0ma/2.1ma)
(!!!!) (Best Pair #1) 12AT7 RCA gray plates NOS 1970-1971 (11/10ma and 10.8/11.6ma) (Fender, VTL, Croft) 1-5% matched
(!!!) 76 RCA NOS 1940's (6.0ma)
(!!!) (2nd Best Pair) 311B Amperex made in Russia NOS 1977 (31.8ma and 33.2ma) (very good construction)
