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(!!!!!) (Best Pair #1) 5U4GB HYTRON NOS 1960 "O" getter halos (56-58/40 and 57-58/40)
(!!!!!) (Best Pair) 5U4GB CBS NOS 1959 (56-60/40 and 56-58/40)
(!!!!) (Best Overall Pair) 5U4GB RCA NOS 1975 same date codes (61-60/40 and 60-60/40) 1-2% matched (Best Sound)
(!!!!) (BEST PAIR #2) 5U4GB RCA NOS 1972-1975 era (59-60/40 and 60-60/40) 1-2% matched (best sound)
(!!!!) (Best Pair 1963) 5U4GB GE NOS 1963 same date codes (60-62/40 and 60-60/40 x 2 tubes)
(!!!!) (BEST SINGLE) 5U4GB Raytheon "O" getter NOS 1962 (58/40 and 60/40)
(!!!!) (BEST SINGLE) JAN-CHY-5U4G CBS NOS 1957 (58/40 and 60/40)
(!!!!) (Best Value Pair) 5U4GB RCA NOS and like new 1974-1975 (59-60/40 and 60-60/40) slightly tilted glass
(!!!!) (Best Value Single) 5U4G Emerson by Tungsol used/very good rattle inside base from dried glue particles 1952 (52/40 and 52/40)
(!!!!) (Best Value Single) 5U4G Ken Rad used/good 1940's (48/40 and 50/40)
(!!!!) (BEST VALUE SINGLE) 5U4G TUNGSOL NOS 1952 slightly tilted glass (52/40 and 52/40)
(!!!!) (Best Value Single) JAN-CHY-5U4G CBS used/very good "D" getter 1946 (53/40 and 53/40) 1% section balance
(!!!!) (READ REVIEW) GB-5931 Sylvania brown base gold brand 1960's (60/40 and 65/40)
(!!!!) (Recommended GE Pair) 5U4GB GE NOS 1966 (56-59/40 and 56-58/40)
(!!!) (Best Pair) 5U4GB Sylvania NOS 1960's (59-62/40 and 60-62/40)
(!!!) (Best Single) 5U4GB Hytron NOS "O" getter halo 1960 era (59/40 and 60/40)
(!!!) (Best Value) 5U4GB RCA low hours/like new 1970 (55-55/40) 1% section balance
(!!!) (Best Value) 5U4GB RCA used/tests like new 1955 (60-62/40) 1-3% section balance
(!!!) (Single) 5U4GB CBS NOS double "D" getters 1958 (61/40 and 70/40)
(!!!) (SINGLE) 5U4GB RCA NOS 1966 (60/40 and 68/40)
