The 3CX3000A7 and 3CX3000F7 are forced air-cooled metal-ceramic triodes with a thoriated-tungsten cathode. Its anode dissipation is 4kW. It’s intended for use as a RF power amplifier, oscillator or modulator. The 3CX3000F7 is used in lower frequency applications, and its grid and cathode leads are connected to 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        Feedback……0.6pF    Output……24Pf

Mounting……Upright

Cooling……forced air

Diameter……105.56mm

Weight……3.4kg

Temperature at anode shell and sealing joint……250°C

 

Maximum ratings:

(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