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(!!!!!) (Best Single #2) JG-6072 GE double mica black plates "O" getter NOS 1963 (3.3/3.1ma) (AKG, Tele 251, Peluso, Rode) (similar sound to 5-Star GE)
(!!!!!) (READ REVIEW) 6J5GT Raytheon black ribbed plate NOS 1950 era (9.2ma and 9.2ma) 1-2% matched
(!!!!!) (Recommended Single) JG-6072 GE triple mica black plates "O" getter NOS 1962 (2.9/2.3ma) (AKG, Tele 251, Peluso, Rode) (similar sound to 5-Star GE)
(!!!!!) (Set of 4) 6J5GT Raytheon black ribbed plate NOS 1950 era (set of 4 tubes between 7-10ma)
(!!!!) (Best Holland Pair) EF86 ADZAM Holland NOS 1963-1964 (3.5ma and 3.5ma) 1-3% matched
(!!!!) (Best Overall Single) 6072 GE "5-Star" NOS black plates triple mica "O" getter halo 1960 (3.5/3.4ma) (mic grade) (Highest mA and Gm)
(!!!!) (Best Overall) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (113ma/119ma) (close triode section balance)
(!!!!) (Best Pair #2) EF86 ADZAM made by Valvo Germany NOS 1970 (3.1ma and 2.9ma) 1-5% matched
(!!!!) (Best Pair #2) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (84ma/104ma and 91ma/95ma) (close Gm balance)
(!!!!) (Best Pair 1971) 12AX7 Philips Holland NOS 1971 (1.2/1.2ma and 1.2/1.3ma) 1-3% matched
(!!!!) (Best Pair) 6J5GT Raytheon metal base black ribbed plate NOS 1940's (8.5ma and 8.7ma) (1-3% matched)
(!!!!) (Best Pair) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (94ma/91ma and 92ma/103ma) (close Gm balance)
(!!!!) (Best Single #2) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (117ma/141ma) (close Gm balance)
(!!!!) (Best Single #2) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (94ma/100ma) (close triode section balance)
(!!!!) (Best Single 1958) CV455=12AT7 Mullard "D" getter NOS 1958 (8.6/8.8ma) 1-2% section balance (Same Gm)
(!!!!) (Best Single 1959) 12AX7 Amperex Bugle Boy Holland large O" getter halo used/good 1959 (Gm=1500/1400 and 1.0/0.7ma) (161 series)
(!!!!) (Best Single) 6BM8=ECL82 Philips Import by Mullard UK NOS 1969 (2.1ma/46ma)
(!!!!) (Best Single) 6SL7GT Sylvania NOS branded Zenith 1950's tall bottle (2.9/2.9ma) 1-2% section balance
(!!!!) (Best Value Pair) 6J5GT Raytheon black ribbed plate NOS 1940's tilted bottom mica (8.6ma and 8.2ma) (best value)
(!!!!) (Best Value Pair) 6J5GT Raytheon metal base black ribbed plate NOS 1940's (9.6ma and 9.8ma) (1-3% matched)
