RF Power Grid Tubes · Triodes
GU-43B Russian Power Triode
Russian metal-ceramic triode with 1.5 kW plate dissipation and excellent UHF characteristics up to 300 MHz, used in HF to VHF linear amplifiers.
- Plate Dissipation
- 1500 W
- Max Frequency
- 300 MHz
- Max Plate Voltage
- 5.0 kV
- Max Plate Current
- 0.8 A
About the GU-43B
The GU-43B is a power triode manufactured by Svetlana / Reflector. Russian metal-ceramic triode with 1.5 kW plate dissipation and excellent UHF characteristics up to 300 MHz, used in HF to VHF linear amplifiers.
Key ratings of the GU-43B include tube type Triode, plate dissipation 1500 W, max plate voltage 5.0 kV, max plate current 0.8 A, mu 45 and max frequency 300 MHz.
Typical applications are HF grounded-grid amplifiers, VHF linear amplifiers, amateur radio high-power and military HF/VHF communications. Notable features: 1.5 kW plate dissipation, 300 MHz operation, russian military heritage and grounded-grid circuit suitability.
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 GU-43B 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 | 5.0 kV |
| Max Plate Current | 0.8 A |
| Mu | 45 |
| Max Frequency | 300 MHz |
| Filament Voltage | 12.6 V |
| Filament Current | 5.5 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 grounded-grid amplifiers
- VHF linear amplifiers
- Amateur radio high-power
- Military HF/VHF communications
Key features
- 1.5 kW plate dissipation
- 300 MHz operation
- Russian military heritage
- Grounded-grid circuit suitability
Related parts & equivalents
Recommended alongside or as alternatives to the GU-43B.
Similar RF Power Grid Tubes
Comparable type, ratings, manufacturer or applications.
Vacuum capacitors for tank & matching circuits
Often ordered with the GU-43B for the same system.
Frequently asked questions
What is the GU-43B?
The GU-43B is a power triode manufactured by Svetlana / Reflector. Russian metal-ceramic triode with 1.5 kW plate dissipation and excellent UHF characteristics up to 300 MHz, used in HF to VHF linear amplifiers.
What are the specifications of the GU-43B?
Tube Type: Triode; Plate Dissipation: 1500 W; Max Plate Voltage: 5.0 kV; Max Plate Current: 0.8 A; Mu: 45; Max Frequency: 300 MHz; Filament Voltage: 12.6 V; Filament Current: 5.5 A; Cooling: Forced air.
What is the GU-43B used for?
The GU-43B is used in HF grounded-grid amplifiers, VHF linear amplifiers, amateur radio high-power and military HF/VHF communications.
What are alternatives or related parts to the GU-43B?
Related and comparable parts include GU-74B, GU-84B, 3CX3000F7, 8877, TH308 and 8874. Contact PartnerTubes to confirm interchangeability for your equipment.
Where can I buy the GU-43B?
The GU-43B 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=GU-43B or email info@partnertubes.com.