TUBE 6528

The 6528 is a long life, mechanically rugged, twin power triode developed especially for use as passing tube in series regulated power supplies. For this service, a tube must be able to pass large currents over a wide voltage range and still exhibit a low intrinsic voltage drop when operated "wide open". The 6528 adequately meets these requirements. The design features zirconium coated graphite anodes that, while lighter in weight than similar metal anodes, remain warp free during life and provide one of the best gas "gettering" means known. The anodes are supported by ceramic insulators. The use of these insulators and the hard glass envelope permit the tube to be outgassed at high temperatures during the manufacturing exhaust process. This allows the tube to be run at high temperatures during operation, without the evolution of harmful gas from the tube parts.