6L6GB
The 6L6GB is a beam power tetrode vacuum tube. It is a medium-power audio amplifier tube and was an early development in the 6L6 family. The 6L6GB was designed as an improvement over the original 6L6, offering increased plate dissipation and a longer service life. It features a glass envelope and typically a metal base with a octal pin arrangement. This tube is well-known for its warm and robust tone, making it a popular choice in vintage and modern guitar amplifiers.
Introduced by RCA in the late 1940s, the 6L6GB was intended to replace the 6L6 in many
While it shares many characteristics with its successors like the 6L6GC, the 6L6GB has a slightly different