Full-Wave Rectifier
The 12X4 Vacuum tube is a miniature type used in power
supplies of automobile and AC-operated radio receivers.
It is equivalent in performance to larger type tubes such
as 6X5's and 6X5GT's. They require a miniature 7-contact
socket and may be mounted in any position. It is
especially important that this tube, like other
power-handling tubes, be adequately ventilated.
Electrical Data:
Heater Voltage ................................ 12.6 V
Heater Current ............................... 0.3 A