The Penta 572B is a high-mu power triode intended for use in class AB, class B, class C RF, and Audio amplifiers. The Penta 572B may be used as a direct drop-in replacement in equipment designed for the 811A or T160L. Reliability will be enhanced by the upgraded overload capability of the Penta 572B. The Penta 572B power tube features a massive graphite anode for high peak overload capability and a high average plate dissipation of 160 Watts.