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
The 6SN7GT was introduced by RCA circa 1939 and became one of the most widely used dual triodes in audio, serving as driver, phase splitter, and voltage amplifier. The GTB version added controlled heater warm-up time and higher max heater-cathode voltage (200V vs 100V for GT).
5692 is the ruggedised/premium version (red base) with tighter parameter matching, 10,000-hour rated life, and lower microphonics. 6180 is the industrial equivalent of the 6SN7WGT.
ECC32 (Mullard) and B65 (STC/Brimar) are European equivalents on the same Octal base with identical pinout. CV1988 is the British military designation for B65.
There are no Soviet analogs to 12AU7/12AT7/12AX7, but the 6N8S (6Н8С) is the direct Soviet equivalent of the 6SN7GT with the same Octal pinout.
Pin Layout — Octal
1Control Grid (section 2)
2Anode (section 2)
3Cathode (section 2)
4
Socket-Compatible Tubes ⚠ Not electrically compatible