RF Power Grid Tubes · Tetrodes
4CX20000A Ceramic Tetrode
Available on request
Eimac / CPI
4CX20000A
Largest in the 4CX series, this ceramic tetrode has 20 kW plate dissipation for very high-power broadcast and industrial RF applications.
- Plate Dissipation
- 20000 W
- Max Frequency
- 100 MHz
- Max Plate Voltage
- 12 kV
- Max Plate Current
- 6.0 A
Worldwide shipping
Cross-reference support
Grunius BV · Groningen, NL
4CX20000A
Request quote
About the 4CX20000A
The 4CX20000A is a power tetrode manufactured by Eimac / CPI. Largest in the 4CX series, this ceramic tetrode has 20 kW plate dissipation for very high-power broadcast and industrial RF applications.
Key ratings of the 4CX20000A include tube type Beam Tetrode, plate dissipation 20000 W, max plate voltage 12 kV, max plate current 6.0 A, max frequency 100 MHz and filament voltage 7.5 V.
Typical applications are MW/SW broadcast at 1 MW class, very high-power ISM RF heating and military HF strategic communications. Notable features: 20 kW plate dissipation, water-cooled high-power operation, top-of-range 4CX tetrode and strategic broadcast applications.
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 4CX20000A 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 | 20000 W |
| Max Plate Voltage | 12 kV |
| Max Plate Current | 6.0 A |
| Max Frequency | 100 MHz |
| Filament Voltage | 7.5 V |
| Cooling | Water |
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
- MW/SW broadcast at 1 MW class
- Very high-power ISM RF heating
- Military HF strategic communications
Key features
- 20 kW plate dissipation
- Water-cooled high-power operation
- Top-of-range 4CX tetrode
- Strategic broadcast applications
Related parts & equivalents
Recommended alongside or as alternatives to the 4CX20000A.
Similar RF Power Grid Tubes
Comparable type, ratings, manufacturer or applications.
Vacuum capacitors for output networks
Often ordered with the 4CX20000A 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 4CX20000A?
The 4CX20000A is a power tetrode manufactured by Eimac / CPI. Largest in the 4CX series, this ceramic tetrode has 20 kW plate dissipation for very high-power broadcast and industrial RF applications.
What are the specifications of the 4CX20000A?
Tube Type: Beam Tetrode; Plate Dissipation: 20000 W; Max Plate Voltage: 12 kV; Max Plate Current: 6.0 A; Max Frequency: 100 MHz; Filament Voltage: 7.5 V; Cooling: Water.
What is the 4CX20000A used for?
The 4CX20000A is used in MW/SW broadcast at 1 MW class, very high-power ISM RF heating and military HF strategic communications.
What are alternatives or related parts to the 4CX20000A?
Related and comparable parts include 4CX15000A, 3CX30000H7, 4CX10000D, 4CX1000A, 4CX3000A and 4CX5000A. Contact PartnerTubes to confirm interchangeability for your equipment.
Where can I buy the 4CX20000A?
The 4CX20000A 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=4CX20000A or email info@partnertubes.com.