(!!!!!) (Best Overall Pair) 6SN7GTB Sylvania NOS 1970 era same date codes (8.4/8.6ma and 9.0/9.4ma) (Schiit Freya)
(!!!!!) (Best Overall Single) 6SN7GTB Sylvania NOS 1970 era (10.8/10.8ma) (High Gm) 1% section balance
(!!!!!) (Best Overall Syvania Pair) 6SN7GTB Sylvania NOS 1960's (8.0/8.6ma and 7.8/8.4ma) (Schiit Freya, Rogue, Modwright OPPO)
(!!!!!) (Recommended Pair) 6SN7GTB RCA NOS 1960's - 1970 (9/10ma and 9.6/10.6ma)
(!!!!!) (Recommended Pair) 6SN7GTB Sylvania NOS copper grid posts 1960-1961 (7.0/7.4ma and 7.4/7.8ma) (Schiit Freya, Rogue, Modwright OPPO)
(!!!!) (Best Overall Pair) 5692 Sylvania brown base NOS 1965 (8.5/8.7ma and 8.6/9.8ma) (Schiit Freya, Cary)
(!!!!) (BEST Value Pair) 6SN7GTB CBS SHORT BOTTLE used/good 1950's
(!!!!) (Best Value Pair) 6SN7GTB GE NOS 1969-1970 (8.8/9.0ma and 8.0/8.8ma) (Schiit Freya)
(!!!!) (Recommended Pair) 6SN7GTB Westinghouse USA gray plates NOS 1962-1964 (7.2/8.4ma and 7.2/8.0ma)
(!!!!) (Recommended Single) 5692 RCA RED BASE black plates NOS 1975 (7.4/9.0ma) (Schiit Saga+)
(!!!) (Recommended Pair) 6SN7GTB Sylvania NOS early 1970 era (8.0/8.8ma and 8.0/9.4ma)
(!!!) (Recommended Single) 6SN7GTB RCA Canada black plates NOS around 1960 rebranded Westinghouse Canada (11.6/14.2ma) (High Ma and Gm)
(!!!) 6SN7GT RCA NOS copper grid posts slightly tilted glass 1952 (8.8/9.2ma)
(!!) (Good Value Single) 5692 RCA RED BASE rebranded GE used/good 1968 (7.6/7.8ma)
(!!) (Good Value) 6SN7GT GE JAN Canada NOS around 1950 (8/10.2ma)
(!!) (slightly microphonic) 6SN7GTA GE NOS "U" getter halo - side getter - copper grid posts 1953 (11.0/11.4ma)
(!!) 5692 Sylvania brown base NOS 1960 era (9.0/10.8ma)
(!!) 6SN7GT RCA used/good 1953 (6.6/7.6ma)
(!!) 6SN7GT Tungsol black plates used/60-70% 1951 (6.0/6.2ma)
(!!) 6SN7GTB CBS branded MOTOROLA black base black plates side-getter NOS, the same shape as Sylvania 6SN7GTB 1960 era (9.2/9.4ma)
