(!!!!) (Best Single) 6AS7G RCA gray plates NOS 1961 (85ma/123ma)
(!!!!) (Recommended PAIR) 5998A Sylvania JAN NOS 1980 (129/142ma and 129/141ma) (5998A=7236)
(!!!!) (Recommended Single) 6AS7G RCA black plates clear top NOS 1946 (65ma/100ma)
(!!!) (Best Pair #3) 5998A Sylvania JAN NOS 1980 (122/123ma and 124/123ma) (5998A=7236)
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (115/114ma and 116/114ma) (5998A=7236) 1-3% matched
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (122/127ma and 123/126ma) (5998A=7236)
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (124/126ma and 126/122ma) (5998A=7236)
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (132/136ma and 133/136ma) (5998A=7236)
(!!!) (Best Single) 5998A Sylvania JAN NOS 1980 (127/135mA)
(!!!) (Best Single) 5998A Sylvania JAN NOS 1980 (144/131mA) (Close Gm)
(!!!) (Recommended Single) 5998A Sylvania JAN NOS 1980 (112/119mA)
(!!!) (Recommended Single) 5998A Sylvania JAN NOS 1980 (118/116mA)
(!!!) (Recommended Single) 5998A Sylvania JAN NOS 1980 (124/119mA)
(!!) (BEST SINGLE) 6AS7GA Sylvania metal base NOS 1960's (103/106ma)
(!!) (BEST SINGLE) 6AS7GA Sylvania metal base NOS 1960's (107/111ma)
(!!) (BEST SINGLE) 6AS7GA Sylvania metal base NOS 1960's (84/90ma)
(!!) 6AS7G Russian branded National NOS 1990's (50ma/86ma)
(!!) 6AS7G Russian branded National NOS 1990's (51ma/77ma)
(!!) 6AS7G Russian branded National NOS 1990's (62ma/65ma)
(!) (Best Single) 6AS7GA RCA black plates NOS 1972 (114ma and 127ma)