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(!!!!) (Best Pair #2) 5U4GB RCA Super Airline and RCA NOS 1960's (58-60/40 and 59-60/40) 1-2% matched
(!!!!) (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) JAN-CHY-5U4G CBS used/very good "D" getter 1946 (53/40 and 53/40) 1% section balance
(!!!) (Best Value) 5U4GB RCA low hours/like new 1970 (55-55/40) 1% section balance
(!!) (Best Value Single) 5U4G RCA "D" getter halo NOS 1952 - 1 small flake inside glass - tilted glass (60/40 and 60/40) 1% section balance
(!) (Best Value Single) 5U4G Dumont by Tungsol used/good 1954 (50/40 and 52/40)
5U4G Crosley Sylvania used/good 1950 (55/40 and 56/40) stains at top from usage
5U4G RCA used/good 1953 a few oxide flakes inside tube (50/40 and 52/40)
5U4G Sylvania used/good 1948 small getter (54/40 and 55/40)
5Z3P Chinese (substitute is 5U4G or 5U4GB)
