... oscillator,amplifier or modulator at frequencies up to 220 MHz,Class AB1 audio amplifi Electron tube 4CX5000A/8170 ... oscillator, amplifier or modulator at frequencies up to 220 MHz, Class AB1 audio amplifier, or as a screen ... (Max.)75 WattsFrequency for Max. rating (CW)220 MHzAmplification Factor4.5Filament/CathodeThoriated TungstenVoltageCurrent7.5 Volts75 AmpsCapacitanceGrounded ...