Chinese Shuguang 6L6WGB.

The beam power quadrupole has an anode limiting power of 19W, which is amplified in the audio amplifier by A1, AB1, and AB2. At the same time, these tubes can also be used in electronic voltage regulator circuits.

The 6L6WGB is similar to the 6L6,6L6WGC,6L6GC,5881 and can be used interchangeably.