(!!!!!) (Best Value Pair) 6SN7GTB GE NOS 1955-1964 same build (6.1/6.5ma and 6.0/6.3ma)
(!!!!) (Best Single) 5692 CBS Hytron Brown base NOS 1957 (9.4/9.0ma) (same Gm)
(!!!!) (Best Single) 6SN7GTB RCA NOS 1958 side getter (9.6/9.8ma)
(!!!!) (Best Single) 6SN7GTB RCA NOS 1960 (10/11ma) (Highest Gm)
(!!!!) (Best Single) CV181=ECC32 Mullard black base black plates NOS 1950's (6.6/6.3ma)
(!!!!) (Best Single) JAN-CHS-6SN7W Sylvania "SHORT BOTTLE" NOS 1945 in Admiral box (8.2/8.0ma) (1-3% section balance)
(!!!!) (Best Value Pair) 6SN7GTB GE NOS 1970 era (7.1/6.8ma and 7.2/7.2ma) (Schiit Freya)
(!!!!) (Good Value Pair) 6SN7GTB GE NOS and like new 1960-1964 (7.0/7.8ma and 7.0/6.8ma)
(!!!!) (Good Value Single) 6SN7GTA GE "U" getter halo used/good 1954 (6.0/6.4ma)
(!!!!) (Recommended Single) 5692 RCA RED BASE black plates used/good 1953 (7/8ma) (Schiit Saga+)
(!!!!) (Single) JAN-CHS-6SN7W Sylvania "SHORT BOTTLE" 1945 low hours like new in Admiral box (7.8/9.8ma)
(!!!) (Best Single 1949) 6SN7GT RCA black plates coated glass NOS 1949 (9.4/9.8ma)
(!!!) (Best Value Pair) 6SN7GTB GE low hours/like new 1955-1958 (8.2/9.0ma and 7.6/8.2ma) (Schiit, Ayon, Rogue) (close Gm)
(!!!) (Good Value Single) 6SN7GTB Tungsol tall bottle used/good 1960 era (7.5/7.5ma) 1% section balance
(!!!) (Recommended Single) 6SN7GTB Sylvania chrome top gray plates low hours 1950's (8.6ma/8.4ma)
(!!!) (Recommended Single) 6SN7GTB Sylvania NOS 1960's (7.2ma and 6.6ma)
(!!!) (Recommended Single) 6SN7GTB Sylvania used/tests like new 1960's (8.2ma and 7.6ma)
(!!!) 6SN7GT Raytheon parallel plates NOS 1953 (8.5/10ma)
(!!!) 6SN7GTA Sylvania "chrome top" TALL bottle used/good 1950 era (6.2/6.2ma)
(!!!) 6SN7GTB Westinghouse black plates copper grid posts "D" getter 1950's (7.2/8.4ma)