6BL7GT

Octal 8-pin high-perveance dual power triode built to handle high peak pulse currents in television vertical deflection circuits and custom audio driver stages. Equivalents: 6BL7GTA (Note: The GT suffix denotes a non-controlled heater warm-up interval). Real-Life Examples: Early color television vertical scan networks, high-end custom OTL headphone amplifiers, vintage industrial control circuits.