Same electricals but Loctal base — not pin-compatible with Octal
Electrical Specifications
Absolute Maximum
Anode Voltage (max)Anode Voltage (max)450V
Anode Dissipation (max)Anode Dissipation (max, per section)5W
Cathode Current (max)Cathode Current (max)20mA
Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max)200V
Typical Operating
Notes
12.6V heater version of the 6SN7WGT. Heater current is 0.3A at 12.6V (vs 0.6A at 6.3V). Same Octal base and pinout — a drop-in replacement when used with series heater wiring.
The 'W' designation indicates ruggedised construction meeting military specifications for vibration and shock resistance.
Brans Vademecum groups the 12SN7WGT with a large equivalence family including 12SX7GT, 13D1, 14N7, 6CG7, 6FQ7, 6SN7WGT(A), 7N7, 8CG7, 8FQ7, and others.
Raytheon data for 12SN7GT confirms: 12.6V/0.3A heater, mu=20, gm=2600 umhos, ra=8500 ohms at Va=250V, Vg=-8V.
Electrically identical to the 6SN7GT — same section specs, same operating conditions. The only difference is the heater voltage/current ratio.
Pin Layout — Octal
1Control Grid (section 2)
2Anode (section 2)
3Cathode (section 2)
4
Socket-Compatible Tubes ⚠ Not electrically compatible