8077/7054 is a type of vacuum tube. It is a three-section medium-power beam power tetrode, used for the audio output stages of high-fidelity amplifiers, and for rf power amplifiers. It was designed and developed by RCA, and introduced in late 1947. It was one of the first tetrodes to be used in audio applications. The 8077/7054 has an internal structure that allows for higher-powers and improved linearity. It has an enhanced dynamic range, and can be used in both Class A and Class AB operation. It has a maximum plate (dissipater) rating of 100 watts, with a maximum amplification factor of 15. It has a maximum operating frequency of 60 MHz and an average grid (grid current) rating of 10 mA. The 8077/7054 tube is a reliable, durable and cost-effective tube that is still used in many amplifiers and other musical instrument-related applications today.