The 3CX3000A7 and 3CX3000F7 are forced air-cooled metal ceramic triodes with a thoriated-tungsten filament and 4kW anode dissipation power, intended for use as a RF power amplifier, oscillator or modulator. The 3CX3000F7 is used to simplify installation in lower frequency applications, and the grid and cathode wires are drawn out on the tube base.

 

Specifications:

Filament Voltage……7. 5V

Filament Current

    3CX3000A7……………… 51.5A

    3CX3000F7……………… 50.5A

Amplification Factor (average)……160

Interelectrode Capacitances (Grounded-cathode)

    Input……38.1pF        Transfer……0.6pF    Output……24Pf

Installation method……Vertical, anode up or down

Cooling……forced air

Diameter……105.56mm

Weight……3.4kg

Temperature at anode shell and sealing joint……250oC

 

Extreme conditions

(RF power amplifier or modulator, class AB2, grid-driven, single tube)

Anode Voltage…… 5000V

Anode Current……2.5Adc

Grid Dissipation……225W

Anode Dissipation……4000W

 

Typical conditions

Dual tubes, unless specified otherwise, sine wave

Anode Voltage……4000Vdc

Zero Signal Anode Current……0.5Adc

Peak Signal Anode Current……3.58Adc

Anode Resistance……2720Ω

Input Grid Voltage (single)……190V

Peak Driving Power……115W

Anode Dissipation……1850W

Signal Anode Output Power……10.5kW