RF Power Grid Tubes · Tetrodes
4CX3000A Ceramic Tetrode
Available on request
Eimac / CPI
4CX3000A
High-power ceramic-metal tetrode with 3 kW plate dissipation for medium and high-power broadcast transmitters and industrial RF systems.
- Plate Dissipation
- 3000 W
- Max Frequency
- 110 MHz
- Max Plate Voltage
- 6.5 kV
- Max Plate Current
- 1.5 A
Worldwide shipping
Cross-reference support
Grunius BV · Groningen, NL
4CX3000A
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About the 4CX3000A
The 4CX3000A is a power tetrode manufactured by Eimac / CPI. High-power ceramic-metal tetrode with 3 kW plate dissipation for medium and high-power broadcast transmitters and industrial RF systems.
Key ratings of the 4CX3000A include tube type Beam Tetrode, plate dissipation 3000 W, max plate voltage 6.5 kV, max plate current 1.5 A, screen voltage 500 V and transconductance 65 mA/V.
Typical applications are AM/FM medium-wave broadcast, HF shortwave transmitters, industrial RF heating 13.56 MHz and high-power SSB amplifiers. Notable features: 3 kW plate dissipation, high 65 mA/V transconductance, forced-air cooling and industry-standard broadcast tetrode.
Power tetrodes add a screen grid to the triode structure, giving higher gain and lower drive power. They are widely used in FM and TV broadcast transmitters, HF communications, plasma heating and accelerator RF systems, usually together with vacuum capacitors in the output network.
PartnerTubes supplies the 4CX3000A worldwide from Groningen, the Netherlands — availability, lead time and price are confirmed per enquiry. Our team can help with equivalent and cross-reference types, sockets and accessories, and supply programmes for OEM and maintenance customers. Interchangeability must always be confirmed for the specific equipment.
Technical specifications
| Tube Type | Beam Tetrode |
|---|---|
| Plate Dissipation | 3000 W |
| Max Plate Voltage | 6.5 kV |
| Max Plate Current | 1.5 A |
| Screen Voltage | 500 V |
| Transconductance | 65 mA/V |
| Max Frequency | 110 MHz |
| Filament Voltage | 7.5 V |
| Filament Current | 10 A |
| Cooling | Forced air |
Specifications are indicative and based on published manufacturer data. Always verify against the official datasheet and confirm suitability for your application before ordering.
Applications & features
Used in
- AM/FM medium-wave broadcast
- HF shortwave transmitters
- Industrial RF heating 13.56 MHz
- High-power SSB amplifiers
Key features
- 3 kW plate dissipation
- High 65 mA/V transconductance
- Forced-air cooling
- Industry-standard broadcast tetrode
Related parts & equivalents
Recommended alongside or as alternatives to the 4CX3000A.
Similar RF Power Grid Tubes
Comparable type, ratings, manufacturer or applications.
Vacuum capacitors for output networks
Often ordered with the 4CX3000A for the same system.
Jennings UCSL 25–200 pF Variable Vacuum Capacitor 25 kV
Jennings Technology (CPI)
Capacitance Range 25–200 pF
Jennings UCSL 15–100 pF Variable Vacuum Capacitor 20 kV
Jennings Technology (CPI)
Capacitance Range 15–100 pF
Jennings UCSL 10–60 pF Variable Vacuum Capacitor
Jennings Technology (CPI)
Capacitance Range 10–60 pF
Frequently asked questions
What is the 4CX3000A?
The 4CX3000A is a power tetrode manufactured by Eimac / CPI. High-power ceramic-metal tetrode with 3 kW plate dissipation for medium and high-power broadcast transmitters and industrial RF systems.
What are the specifications of the 4CX3000A?
Tube Type: Beam Tetrode; Plate Dissipation: 3000 W; Max Plate Voltage: 6.5 kV; Max Plate Current: 1.5 A; Screen Voltage: 500 V; Transconductance: 65 mA/V; Max Frequency: 110 MHz; Filament Voltage: 7.5 V; Filament Current: 10 A; Cooling: Forced air.
What is the 4CX3000A used for?
The 4CX3000A is used in AM/FM medium-wave broadcast, HF shortwave transmitters, industrial RF heating 13.56 MHz and high-power SSB amplifiers.
What are alternatives or related parts to the 4CX3000A?
Related and comparable parts include 4CX1000A, 4CX5000A, 3CX3000F7, 4CX10000D, 4CX15000A and 4CX250B. Contact PartnerTubes to confirm interchangeability for your equipment.
Where can I buy the 4CX3000A?
The 4CX3000A is available from PartnerTubes (Grunius BV, Groningen, Netherlands) with worldwide shipping. Availability and lead time are confirmed on request. Request a quote at https://www.partnertubes.com/contact/?part=4CX3000A or email info@partnertubes.com.