Full-Wave Rectifier
Developed in 1937, the 84 / 6Z4 Vacuum tube is a glass
type used in power supplys of automobile and ac-operated
radio receivers. They require a five-contact socket.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.5 A
Maximum Heater-Cathode Voltage ................ 500 V
Substitutes ........................... 84, 98, 6Z4
Please note that this 84 /6Z4 5 pin Vacuum Tube type is
NOT equivalent to the Chinese 6Z4 miniature 7 pin tube.
There is a major difference in size, pin structure and
not to mention the USA made 84 /6Z4 was manufactured to
meet the needs of a 1930's radio. Where as the Chinese
6Z4 is the size of an EL84 and is used in modern day
Headphone preamps like the Xian Sheng 708B.