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(!!!) (Best Single) 6SU7GTY=6188 Tungsol round black plates coated glass NOS 1940's (2.8/2.7ma)
(!!!) (Good Value) 6SL7WGT Sylvania brown base round black plates "D" getter halo used/good 1955 (1.5/1.6ma)
(!) (SINGLE) 6SL7GT RCA round black plates NOS 1970 (2.0/2.1ma)
(!!) (single) 6SL7GT RCA NOS black plates gray coated glass 1959 (2.0/1.7ma)
(!!!!) (Best Single 1944) 6SL7GT Sylvania round black plates NOS 1944 (same build as VT-229) (2.1/2.3ma)
(!!!!!) (Best Value Single) JAN-5691 Philips by Sylvania black plates NOS 1985 (2.4/2.6ma) (Best 6SL7GT sub)
(!!) 6SL7GT Sylvania NOS 1960's (2.6/2.2ma) (Eddie Current)
(!!) 6SL7GT Sylvania NOS branded Zenith 1950's tall bottle (3.0/2.9ma)
(!!) 6SL7GT Sylvania NOS tall bottle 1955 (2.0/2.2ma)
(!!!) (Slightly microphonic Single) 6SL7GT Ken Rad NOS 1945 era (2.6/2.3ma)
(!!!!!) (Best Value Single) JAN-5691 Sylvania black plates NOS 1979 (2.1/2.1ma) (Best 6SL7GT sub)
