The 4CX3000A is a metal-ceramic, forced air-cooled tetrode with a thoriated tungsten cathode. At an operating frequency of 150MHz, the anode dissipation power is 3500W. The tube is mainly used in class AB1 linear amplifier on audio frequency or radio frequency applications, for its quality of low intermodulation distortion makes it suitable for single sideband service. It’s also used on class C rf power amplifier and anode-modulated rf power amplifier.

 

Specifications:

Filament Voltage……9V

Filament Current……41.5A

Amplification Factor……5.5

Interelectrode Capacitances (cathode-grounded)

Input……130pF        Feedback……1pF        Output……12.5Pf

Weight……2.5 kg, Height……201mm, Maximum Diameter…… φ118mm

Mounting……Upright

Cooling……forced air

Shell Temperature……250℃

 

Maximum ratings (class C RF amplifier):

Anode voltage...7kV

Anode current...2A

 

Maximum ratings (class C modulated RF amplifier):

Anode voltage...5kV

Anode current...1.4A

 

Typical operation

Anode voltage......5000v

Grid 2 voltage……500v

Anode current……1.4A

Driving power……31w

Anode output power……5750w

 

Typical operation

Anode voltage......7000v

Grid 2 voltage……500v

Anode current……1.9A

Driving power……41w

Anode output power……11kw