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(!!!!!) (BEST OVERALL PAIR #2) 5U4GB RCA NOS 1971-1974 era (58-60/40 and 58-60/40) 1% matched
(!!!!!) (Recommended Pair) 5U4GB HYTRON NOS 1960 "O" getter halos (56-58/40 and 57-58/40)
(!!!!!) (Recommended Pair) 5U4GB HYTRON NOS 1960 "O" getter halos (60-64/40 and 60-66/40)
(!!!!) (BEST OVERALL PAIR) 5U4GB Raytheon NOS "O" getters 1962 (59-60/40 and 59-60/40) 1% matched
(!!!!) (Best Pair #2) 5U4GB RCA Super Airline and RCA NOS 1960's (58-60/40 and 59-60/40) 1-2% matched
(!!!!) (Best Pair 1963) 5U4GB GE NOS 1963 same date codes (60-62/40 and 60-60/40 x 2 tubes)
(!!!!) (BEST PAIR) 5U4GB Raytheon NOS "O" getters 1962 (59-62/40 and 60-62/40)
(!!!!) (BEST SINGLE #1) 5U4GB Raytheon "O" getter NOS 1962 (58/40 and 60/40) (2 in stock)
(!!!!) (BEST SINGLE #1) 5U4GB Raytheon "O" getter NOS 1962 (59/40 and 60/40)
(!!!!) (BEST SINGLE) 5U4GB Raytheon "O" getter NOS 1962 (56/40 and 58/40)
(!!!!) (BEST SINGLE) JAN-CHY-5U4G CBS NOS 1957 (58/40 and 60/40)
(!!!!) (Best Value Single) 274B Western Electric engraved base used/strong 1930's - broken guide pin (50/40 and 53/40) (best value)
(!!!!) (Best Value Single) 5U4G CBS used/tests like new "D" getter 1950 era (55/40 and 60/40)
(!!!!) (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)
(!!!!) (Recommended Pair) 5U4GB RCA NOS and like new 1962 (56-58/40 and 56-58/40)
(!!!!) (SINGLE) 5U4GB Raytheon "O" getter NOS 1962 (56/40 and 60/40)
(!!!!) 5U4G GE NOS 1952 (55/40 and 51/40)
