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(!!!) (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) E80CC=6085 Philips Miniwatt and Mullard SQ Holland 1962-1967 (6.7/7.1ma and 6.7/7.2ma)
(!!!) (2nd Best Pair) 311B Amperex made in Russia NOS 1977 (31.8ma and 33.2ma) (very good construction)
(!!!) (Best 12AT7WC Single) JAN-12AT7WC Sylvania black plates NOS 1978 (9/10ma)
(!!!) (slightly microphonic) 12AU7A Westinghouse black plates "D" getter halo 1964 NOS (9.6/10.6ma) (similar to RCA black plates)
(read review) 12AY7 GE branded RCA gray plates "D" getter NOS 1954 (2.3/2.9ma)
(!!!) (Mullard Pair) ECL82=6BM8 RTC England by Mullard UK NOS 1974-1977 (2.1/30ma and 2.1/29ma) 1-3% matched
(!!!) (Best Mullard Single) ECF80=6BL8 IEC Mullard UK NOS 1966 (16ma/12ma) (Highest mA and Gm)
(!!!) (Best Overall Pair) JHS-6J6WA Sylvania NOS "D" getter halo 1960 (9.8/10.4ma and 9.8/10.5ma) (Highest Ma and Gm) 1-2% matched
(!!!) (Best Overall Single) 5842 Raytheon branded RCA NOS windmill getter galo 1967 (43.8ma Gm=32,000)
(!!!) (Best Overall Single) E90F=6BH6 Philips SQ Holland NOS 1968 (8.4ma)
(!!!) (Best Pair) 30 Brimar BVA made in USA but might be made in UK in white boxes 1940's (3.1ma and 3.3ma)
(!!!) (Best Pair) 420A Western Electric NOS 1979 (1.6/1.9ma and 1.6/1.9ma)
(!!!!) (BEST PAIR #1) 6DJ8 Philips by Matshushita JAPAN NOS 1960's (19.8/18.9ma and 18.2/19.5ma)
(!!!) (Best Pair) 6HA5=6HM5=EC900 Amperex Holland "Globe Logo" NOS in white boxes 1971-1972 (12.0ma and 12.8ma)
(!!!) (Recommended Pair) 76 Sylvania NOS - 1 tube branded National Union 1947 era same build (5.3ma and 5.6ma)
(!!!) (Pair) CX-301A Cunningham Balloon used/good 1930-1935 (2.2ma and 2.5ma)
(!!!) (Pair) CX-326 Cunningham balloon used/good 1930 era (4.2ma and 4.5ma) same Gm
