Electron-ray Tube
The EM-84 / 6FG6 Vacuum tube is used as a Signal
strength indicator tube.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ............................... 0.27 A
Preferred Substitutes ................ 6E3P, 6FG6
Substitutes .......................... 6HU6