RF Power Grid Tubes · Triodes
8877 Ceramic Triode (Eimac)
Available on request
Eimac / CPI
8877
High-gain ceramic triode with 1.5 kW plate dissipation, extremely popular for UHF amplifiers and amateur radio high-power amplifiers up to 1 GHz.
- Plate Dissipation
- 1500 W
- Max Frequency
- 1000 MHz
- Max Plate Voltage
- 4.5 kV
- Max Plate Current
- 1.0 A
Worldwide shipping
Cross-reference support
Grunius BV · Groningen, NL
8877
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About the 8877
The 8877 is a power triode manufactured by Eimac / CPI. High-gain ceramic triode with 1.5 kW plate dissipation, extremely popular for UHF amplifiers and amateur radio high-power amplifiers up to 1 GHz.
Key ratings of the 8877 include tube type Triode, plate dissipation 1500 W, max plate voltage 4.5 kV, max plate current 1.0 A, mu 160 and max frequency 1000 MHz.
Typical applications are UHF amplifiers to 1 GHz, amateur radio HF/VHF/UHF amplifiers, scientific RF systems, ISM-band 900 MHz amplifiers and medical diathermy RF. Notable features: 1 GHz maximum frequency, high mu 160, industry-favourite for amateur UHF and compact ceramic envelope.
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 8877 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 | 1500 W |
| Max Plate Voltage | 4.5 kV |
| Max Plate Current | 1.0 A |
| Mu | 160 |
| Max Frequency | 1000 MHz |
| Filament Voltage | 5.0 V |
| Filament Current | 10.5 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
- UHF amplifiers to 1 GHz
- Amateur radio HF/VHF/UHF amplifiers
- Scientific RF systems
- ISM-band 900 MHz amplifiers
- Medical diathermy RF
Key features
- 1 GHz maximum frequency
- High mu 160
- Industry-favourite for amateur UHF
- Compact ceramic envelope
- Extensive published circuit data
Related parts & equivalents
Recommended alongside or as alternatives to the 8877.
Similar RF Power Grid Tubes
Comparable type, ratings, manufacturer or applications.
Vacuum capacitors for tank & matching circuits
Often ordered with the 8877 for the same system.
Jennings UCSL 15–100 pF Variable Vacuum Capacitor 20 kV
Jennings Technology (CPI)
Capacitance Range 15–100 pF
Jennings UCSL 25–200 pF Variable Vacuum Capacitor 25 kV
Jennings Technology (CPI)
Capacitance Range 25–200 pF
Jennings UCSL 10–60 pF Variable Vacuum Capacitor
Jennings Technology (CPI)
Capacitance Range 10–60 pF
Frequently asked questions
What is the 8877?
The 8877 is a power triode manufactured by Eimac / CPI. High-gain ceramic triode with 1.5 kW plate dissipation, extremely popular for UHF amplifiers and amateur radio high-power amplifiers up to 1 GHz.
What are the specifications of the 8877?
Tube Type: Triode; Plate Dissipation: 1500 W; Max Plate Voltage: 4.5 kV; Max Plate Current: 1.0 A; Mu: 160; Max Frequency: 1000 MHz; Filament Voltage: 5.0 V; Filament Current: 10.5 A; Cooling: Forced air; Envelope: Ceramic-metal.
What is the 8877 used for?
The 8877 is used in UHF amplifiers to 1 GHz, amateur radio HF/VHF/UHF amplifiers, scientific RF systems, ISM-band 900 MHz amplifiers and medical diathermy RF.
What are alternatives or related parts to the 8877?
Related and comparable parts include 8874, 3CX3000F7, 4CX1000K, QB3.5-750, 3CX5000A7 and 3CX10000H3. Contact PartnerTubes to confirm interchangeability for your equipment.
Where can I buy the 8877?
The 8877 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=8877 or email info@partnertubes.com.