(!!!!!) (Recommended Pair) E80CF=7643 Valvo branded Philips Miniwatt SQ NOS 1963 (PREMIUM 6BL8 SUB) (Tuners)
(!!!!) (Good Value Pair) 6FQ7 Philips by Sylvania NOS 1980 era (6.2/6.0ma and 6.0/6.2ma)
(!!!!) (Good Value Pair) 6FQ7 RCA clear top NOS 1970's (6.0/7.0ma and 6.6/7.6ma) (same Gm) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!) (Best Overall Pair) 6FQ7 RCA clear top NOS 1964-1966 (8.8/9.4ma and 8.2/9.4ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!) (Best Overall Single) E90F=6BH6 Philips SQ Holland NOS 1968 (8.4ma)
(!!!) (Best Pair #2) 6FQ7 RCA clear top NOS "D" getter halo 1966-1969 (7.6/8.0ma and 7.5/7.8ma) (same Gm) 1-3% matched
(!!!) (Best Pair #3) 6FQ7 RCA clear top NOS "D" getter halo 1965-1966 (7.4/7.6ma and 7.0/7.8ma) (same Gm)
(!!!) (Best Pair) 6AF4A Sylvania NOS 1965 (22.5ma and 22.8ma)
(!!!) (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)
(!!!) (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)
(!!!) (Recommended Pair) 6FQ7 Sylvania NOS 1970's same build (9.0/8.0ma and 8.0/7.6ma)
(!!) (BEST SINGLE) 6FQ7 RCA clear top NOS 1971 (8ma/8.2ma)
(!!) 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)
