vintage Hytron 833A High-power Triode Vacuum Tube Hytron Radio and Electronics Corporation 1921 – c. 1965 Technical Specifications * Tube Type: High-power, medium-mu transmitting triode. * Filament Rating: 10 Volts at 10 Amps (Thoriated Tungsten). * Maximum Plate Dissipation: Up to 300–450 watts depending on cooling configurations. * Operating Voltages: Can handle plate voltages running up to 3,000V–4,000V. Condition: untested. Sold for used condition. With Original used Box . All details the photos………!!