5DJ4 GE NOS 1961 (50/40 and 50/40)
5DJ4 RCA like new 1960's (56/40 and 58/40)
5R4GYA GE branded Westinghouse NOS 1960's (50/40 and 53/40)
5R4GYA GE NOS 1959 (48/40 and 50/40)
5T4 GE NOS 1945 (57/40 and 65/40)
5T4 Raytheon NOS 1950's
5U4G RCA used/good 1953 a few oxide flakes inside tube (50/40 and 52/40)
5U4GB Channel Master Japan 1960 double "D" getter halos low hours/tests like new (65/40 and 68/40)
5U4GB Hitachi Japan NOS branded Marconi 1960's a few very small vertical scratches on base (57/40 and 58/40)
5U4GB Raytheon used/good 1960 era (54/40 and 54/40)
5U4GB Tungsol used/good 1960 (51/40 and 60/40)
5V3 GE branded ITT NOS 1960's (52/40 and 54/40)
5V3A RCA NOS 1962 (47/40 and 48/40)
5V4G Brimar UK "D" getter halo black plates used/good 1950's (58/40 and 59/40)
5W4GT Tungsol NOS 1952 (52/40 and 54/40)
5X4G Cunningham NOS 1946 (51/40 and 52/40)
5X4G RCA NOS 1960 (54/40 and 55/40)
5Z3P Chinese (substitute is 5U4G or 5U4GB)
5Z4 CBS NOS 1954 (53/40 and 55/40)
5Z4 GE Coronado NOS 1950 (48/40 and 50/40)
