Preamplifiers300B-G tube replacement 300B WE300B 300BT 7300B 300B-N for HIFI audio tube amplifier kit DIY precision test and matching four-way300B-G: Direct-heated cathode medium power transistor, used for class A1 amplification. Suitable for applications requiring 10W output power.Filament HeatingUltrafiltration---------5VIF--------1.2AStatic parametersVoltage--------300V-Ug--------60VCurrent value---------60mAGeneral 5.25 hp/VDay--------0.7kUh --------3.85Output--------6.6WFinal RatingAnode voltage: 480VAnode dissipation power: -40WCathode currentSelf-bias voltage - - - - - - - - -100mA-70mA at fixed bias voltageInterelectrode capacitanceInput capacitance: 9PFOutput capacitance: 4.3PFInter-circuit capacitance - 15PFTone: Natural vocals, returning to the intention, restoring the real sound, delicate, full mid- and high-frequency. Preamplifiers Department Unisex Adult Item Weight 1.76 ounces Manufacturer SIBBLE Item model number SIBBLE Package Dimensions 1.18 x 0.79 x 0.39 inches