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(!!!!!) (Best Overall Pair) JAN-6384 Tungsol low hours/test like new 1967-1972 (68.5ma and 66ma)
(!!!!!) (Best Value Single) 45 Sylvania green leaf NOS 1940's production stains on glass (37.2ma) (Highest mA and Gm)
(!!!!!) (Best Value) 45 Tungsol used/good 1940's (27ma)
(!!!!!) (Good Value Pair) 45 RCA/Cunningham engraved base used/75% (22.4ma and 23.8ma) (Close Gm)
(!!!!!) (Good Value Single) 45 Sylvania branded RCA NOS 1952 production stains on glass (31.6ma)
(!!!!) (Best Pair #1) 5881 Tungsol NOS 1954 original boxes (72 and 73ma) (rare)
(!!!!) (Best Pair #1) 5881 Tungsol rebranded Sylvania and GE 1960 era used/test like new (77.3ma and 74.5ma) (close Gm)
(!!!!) (BEST PAIR #2) 2A3 Ken Rad branded GE coated glass NOS 1949-1950 (110ma and 103ma) (close Gm) (sound fantastic)
(!!!!) (Best Pair #2) 5881 Tungsol branded RCA used/good 1963 (64ma and 65ma)
(!!!!) (Best Pair #2) 5881 Tungsol NOS 1954 original boxes (68.5ma and 69.2ma)
(!!!!) (Best Pair #2) 5881 Tungsol NOS 1954 original boxes (68ma and 69.5ma)
(!!!!) (Best Pair #3) 5881 Tungsol used/good 1960's (63.2ma and 66ma)
(!!!!) (BEST PAIR) 2A3 Ken Rad branded GE coated glass NOS 1949-1950 (117ma and 114ma) (sound fantastic)
(!!!!) (Best Single) 6550 Tungsol branded RCA NOS vented plate NOS 1965 (130ma) (Recommended for Audio Research Ref power supply)
(!!!!) (BEST SINGLE) JAN-CHY-5U4G CBS NOS 1957 (58/40 and 60/40)
(!!!!) (Best Value Pair) 5881 GE Canada NOS 1965-1970 (73ma) (same internal build and sonics as 5881 Tungsol)
(!!!!) (BEST VALUE SINGLE) 5U4G TUNGSOL NOS 1952 slightly tilted glass (52/40 and 52/40)
(!!!!) (Best Value Single) 6550 Tungsol branded Sylvania smooth gray plate used/tests like new 1960 era (138ma)
(!!!!) (Good Value Pair) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1-2% matched - slightly faded top getters (54-55/40 x 2 tubes)
(!!!!) (microphonic single) 5687 Tungsol ribbed black plates "U" getter NOS 1952 (42/41.5ma) (1st series made)
