RF Power Grid Tubes · Tetrodes
4CX1000A Ceramic Tetrode
Available on request
Eimac / CPI
4CX1000A
Ceramic-metal beam tetrode with 1 kW plate dissipation for high-power HF and VHF amplification in broadcast and industrial applications.
- Plate Dissipation
- 1000 W
- Max Frequency
- 110 MHz
- Max Plate Voltage
- 5.0 kV
- Max Plate Current
- 500 mA
Worldwide shipping
Cross-reference support
Grunius BV · Groningen, NL
4CX1000A
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About the 4CX1000A
The 4CX1000A is a power tetrode manufactured by Eimac / CPI. Ceramic-metal beam tetrode with 1 kW plate dissipation for high-power HF and VHF amplification in broadcast and industrial applications.
Key ratings of the 4CX1000A include tube type Beam Tetrode, plate dissipation 1000 W, max plate voltage 5.0 kV, max plate current 500 mA, screen voltage 400 V and transconductance 40 mA/V.
Typical applications are HF shortwave broadcast, VHF FM broadcast final stages, RF induction heating and high-power SSB linear amplifiers. Notable features: 1 kW ceramic-metal tetrode, forced-air cooled, industry-proven broadcast design and high transconductance 40 mA/V.
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 4CX1000A 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 | 1000 W |
| Max Plate Voltage | 5.0 kV |
| Max Plate Current | 500 mA |
| Screen Voltage | 400 V |
| Transconductance | 40 mA/V |
| Max Frequency | 110 MHz |
| Filament Voltage | 7.5 V |
| Filament Current | 5.0 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
- HF shortwave broadcast
- VHF FM broadcast final stages
- RF induction heating
- High-power SSB linear amplifiers
Key features
- 1 kW ceramic-metal tetrode
- Forced-air cooled
- Industry-proven broadcast design
- High transconductance 40 mA/V
Related parts & equivalents
Recommended alongside or as alternatives to the 4CX1000A.
Similar RF Power Grid Tubes
Comparable type, ratings, manufacturer or applications.
Vacuum capacitors for output networks
Often ordered with the 4CX1000A 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 4CX1000A?
The 4CX1000A is a power tetrode manufactured by Eimac / CPI. Ceramic-metal beam tetrode with 1 kW plate dissipation for high-power HF and VHF amplification in broadcast and industrial applications.
What are the specifications of the 4CX1000A?
Tube Type: Beam Tetrode; Plate Dissipation: 1000 W; Max Plate Voltage: 5.0 kV; Max Plate Current: 500 mA; Screen Voltage: 400 V; Transconductance: 40 mA/V; Max Frequency: 110 MHz; Filament Voltage: 7.5 V; Filament Current: 5.0 A; Cooling: Forced air.
What is the 4CX1000A used for?
The 4CX1000A is used in HF shortwave broadcast, VHF FM broadcast final stages, RF induction heating and high-power SSB linear amplifiers.
What are alternatives or related parts to the 4CX1000A?
Related and comparable parts include 4CX250B, 4CX3000A, 4CX1000K, 4CX600J, 4CX5000A and 4CX10000D. Contact PartnerTubes to confirm interchangeability for your equipment.
Where can I buy the 4CX1000A?
The 4CX1000A 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=4CX1000A or email info@partnertubes.com.