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(!!!!!) (Recommended Pair) E80CF=7643 Valvo branded Philips Miniwatt SQ NOS 1963 (PREMIUM 6BL8 SUB) (Tuners)
(!!!!) (Best Overall Pair) 6FQ7 RCA clear top NOS "D" getter halo 1969 (8.2/8.0ma and 8.0/7.8ma) (close Gm)
(!!!!) (Best Value Pair) 6FQ7 RCA clear top used/good 1964-1967 (6.0/5.8ma and 6.2/5.4ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!!) (Good Value Pair) 6FQ7 Philips by Sylvania NOS 1980 era (6.2/6.0ma and 6.0/6.2ma)
(!!!) (Best Overall Single) E90F=6BH6 Philips SQ Holland NOS 1968 (8.4ma)
(!!!) (Best Pair) 6AF4A Sylvania NOS 1965 (22.5ma and 22.8ma)
(!!!) (Best Single E90F=6BH6 Philips Holland NOS 1963 (10.2ma)
(!!!) (Best Single) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1961 (Premium 6BL8 SUB) (Highest mA and Gm)
(!!!) (Best Value Pair) E80CF=7643 Valvo Germany branded International NOS 1961-1963 (PREMIUM 6BL8 SUB) (Tuners) 1-5% matched
(!!!) (Best Value Single) E80CF=7643 Valvo Germany branded International NOS 1961 (12.8/18mA) (PREMIUM 6BL8 SUB) (Tuners)
(!!!) (Best Value Single) E80CF=7643 Valvo Germany branded International NOS 1963 (10.8/13.4mA) (PREMIUM 6BL8 SUB) (Tuners)
(!!!) (Pair) 6AF4 Sylvania NOS 1960's (77-78/60)
(!!!) (Recommended Pair) 6DZ4 GE NOS 1960's (21ma and 22ma)
(!!!) (Recommended Pair) 6FQ7 Sylvania NOS 1970's same build (6.4/6.8ma and 6.4/6.4ma)
(!!) (Best Pair) 6AF4 RCA NOS 1970's (23.5ma and 23.8ma)
(!!) (BEST SINGLE) 6CG7 RCA clear top chrome shield NOS 1960's (10ma/9.4ma)
(!!) 6FQ7 RCA clear top NOS 1976 (7ma/8ma)
(!!) 7693=E90F=6BH6 Philips Holland PQ NOS 1964 (6.4ma)
(!) (PAIR) 6DZ4 GE NOS 1960's (19ma and 19ma)
(sold out) EL34 Telefunken Ulm Germany NOS 1961 original box (88ma) (rare)
