Medium-Mu Triode - Sharp-Cutoff pentode
The 4GJ7 / 4GX7 Vacuum Tube is a miniature type used as a
combined oscillator and mixer tube in color and BW TV
receivers utilizing an IF in the order of 40 MHz. It
requires a miniature 9-contact socket.
Electrical Data:
Heater Voltage ................................ 4.1 V
Heater Current ................................ 0.6 A
Substitutes ................ 4GX7