Medium-Mu Triode - Sharp-Cutoff Pentode
The 5U8 Vacuum tube is a miniature type used as combined
oscillator and mixer tube in color and black-and-white
television receivers utilizing an intermediate frequency
in the order of 40 MHz. It requires a miniature 9-contact
socket.
Electrical Data:
Heater Voltage ................................ 4.7 V
Heater Current ................................ 0.6 A
Preferred Substitutes ..................... 5EA8 5GH8
Substitutes .................................... 5CQ8