Medium-Mu Twin Triode * * * * * 12SN7GT, A and B
The 12SN7GT, group or series, of vacuum tubes are a glass
octal type used as a phase inverter or resistance-coupled
amplifier in AC/DC radio equipment. They require an octal
socket.
Electrical Data:
Heater Voltage ................................ 12.6 V
Heater Current ............................... 0.3 A
Preferred Substitutes ................. 12SX7