RF Power Grid Tubes · Triodes
8874 Ceramic Triode (Eimac)
Available on request
Eimac / CPI
8874
Companion to the 8877, this ceramic triode delivers 2 kW plate dissipation with operation up to 800 MHz for high-power VHF and UHF amplifiers.
- Plate Dissipation
- 2000 W
- Max Frequency
- 800 MHz
- Max Plate Voltage
- 5.0 kV
- Max Plate Current
- 1.2 A
Worldwide shipping
Cross-reference support
Grunius BV · Groningen, NL
8874
Request quote
About the 8874
The 8874 is a power triode manufactured by Eimac / CPI. Companion to the 8877, this ceramic triode delivers 2 kW plate dissipation with operation up to 800 MHz for high-power VHF and UHF amplifiers.
Key ratings of the 8874 include tube type Triode, plate dissipation 2000 W, max plate voltage 5.0 kV, max plate current 1.2 A, mu 160 and max frequency 800 MHz.
Typical applications are high-power VHF/UHF amplifiers, industrial RF systems, amateur radio high-power amplifiers and scientific accelerator RF. Notable features: 2 kW plate dissipation, 800 MHz capable, higher power companion to 8877 and same socket family.
Power triodes are three-electrode grid tubes used as RF oscillators and amplifiers in industrial RF heating (plastic welding, induction heating, drying), RF-excited CO₂ lasers, broadcast transmitters and particle accelerators. In oscillator service they work with vacuum capacitors in the tank and matching circuits.
PartnerTubes supplies the 8874 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 | Triode |
|---|---|
| Plate Dissipation | 2000 W |
| Max Plate Voltage | 5.0 kV |
| Max Plate Current | 1.2 A |
| Mu | 160 |
| Max Frequency | 800 MHz |
| Filament Voltage | 5.0 V |
| Filament Current | 12.5 A |
| Cooling | Forced air |
| Envelope | Ceramic-metal |
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
- High-power VHF/UHF amplifiers
- Industrial RF systems
- Amateur radio high-power amplifiers
- Scientific accelerator RF
Key features
- 2 kW plate dissipation
- 800 MHz capable
- Higher power companion to 8877
- Same socket family
Related parts & equivalents
Recommended alongside or as alternatives to the 8874.
Similar RF Power Grid Tubes
Comparable type, ratings, manufacturer or applications.
Vacuum capacitors for tank & matching circuits
Often ordered with the 8874 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 8874?
The 8874 is a power triode manufactured by Eimac / CPI. Companion to the 8877, this ceramic triode delivers 2 kW plate dissipation with operation up to 800 MHz for high-power VHF and UHF amplifiers.
What are the specifications of the 8874?
Tube Type: Triode; Plate Dissipation: 2000 W; Max Plate Voltage: 5.0 kV; Max Plate Current: 1.2 A; Mu: 160; Max Frequency: 800 MHz; Filament Voltage: 5.0 V; Filament Current: 12.5 A; Cooling: Forced air; Envelope: Ceramic-metal.
What is the 8874 used for?
The 8874 is used in high-power VHF/UHF amplifiers, industrial RF systems, amateur radio high-power amplifiers and scientific accelerator RF.
What are alternatives or related parts to the 8874?
Related and comparable parts include 8877, 3CX3000F7, 4CX1000K, 3CX5000A7, 3CX10000H3 and QB3.5-750. Contact PartnerTubes to confirm interchangeability for your equipment.
Where can I buy the 8874?
The 8874 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=8874 or email info@partnertubes.com.