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(!!!!) (Single) 5691 RCA branded GE red base black plates NOS 1960's a few vertical scratches on base (2.1ma/2.3ma)
(!!!) (Slightly Microphonic Single) CV1985=6SL7GTY Brimar UK tests like new 1950's (2.2/2.2ma)
(!!) (Best Tungsol #1) 6SL7GT Tungsol gray ribbed plates NOS 1950's (2.3/2.5ma) (Same Gm)
(!!) (Best Value) VT-229=JAN-CHS-6SL7GT Sylvania NOS white printing 1944-1945, hairline crack in base, mis-matched sections in white box (2.6/3.4ma)
(!!) (Single) GB-6SL7WGT Sylvania Gold Brand brown base round black plates "O" getter NOS 1950's (1.7/1.7ma) 1% section balance
(!!) (slightly microphonic) 6SL7GT RCA NOS 1950 (2.2/2.3ma) 1-2% section balance
(!!) (slightly microphonic) 6SL7GT RCA NOS black plates gray coated glass 1952 (2.8/2.8ma) 1% section balance
(!) (slightly microphonic) 6SL7GT=VT-229 RCA round black plates like new 1942-1945 era (2.4/2.6ma)
(!) (slightly microphonic) JAN-CRC-6SL7GT RCA NOS black plates 1951 tilted glass (2.0/2.2ma)
(!!!) (Best Single) 6SL7GT Sylvania round gray plates NOS 1952-1953 (2.9/2.9ma) 1-2% section balance
(!!!!) (Best Overall Pair) 6SL7GT RCA NOS black plates gray coated glass 1950's (2.3/2.4ma and 2.2/2.4ma)
(READ REVIEW) 6SL7GT Tungsol tall bottle gray ribbed plates around 1960 (2.2/1.6ma)
6SL7GT Brimar NOS black base black plates 1950's (2.2/2.4ma) (slightly microphonic)
(!!) (Best Single) 6SL7GT GE short round chrome plates NOS 1970's (2.9/2.9ma) 1-2% section balance (Highest mA and Gm)
(!!) 6SL7GT Sylvania NOS branded Westinghouse tall bottle 1955 (2.8/2.7ma)
(!!!) (Best Single) 5691 RCA branded GE red base black plates NOS 1956 (2.3/2.0ma) (Same Gm)
(!!!) 6SL7WGT Sylvania brown base round black plates like new 1955 no printing (2.6/2.8ma)
(!!!!) (Single) 5691 RCA branded GE red base gray plates NOS 1960's (2.1ma/2.4ma)
(!) (SINGLE) 6SL7GT RCA round black plates NOS 1970 (2.0/2.1ma)
(!!!!!) (Best Single #1) JAN-5691 Philips by Sylvania black plates NOS 1985 (2.4/2.6ma) (Best 6SL7GT sub)
