RF Power Grid Tubes · Triodes
TH308 Thomson/Thales Power Triode
Available on request
Thomson / Thales
TH308
European ceramic-metal triode from Thomson/Thales with 1.5 kW plate dissipation for HF and VHF broadcast applications.
- Plate Dissipation
- 1500 W
- Max Frequency
- 300 MHz
- Max Plate Voltage
- 5.0 kV
- Max Plate Current
- 0.8 A
Worldwide shipping
Cross-reference support
Grunius BV · Groningen, NL
TH308
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About the TH308
The TH308 is a power triode manufactured by Thomson / Thales. European ceramic-metal triode from Thomson/Thales with 1.5 kW plate dissipation for HF and VHF broadcast applications.
Key ratings of the TH308 include tube type Triode, plate dissipation 1500 W, max plate voltage 5.0 kV, max plate current 0.8 A, max frequency 300 MHz and filament voltage 7.5 V.
Typical applications are HF broadcast transmitters, VHF linear amplifiers, european broadcast systems and scientific RF power. Notable features: 1.5 kW plate dissipation, 300 MHz capable, thomson/Thales quality and european broadcast standard.
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 TH308 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 |
| Max Frequency | 300 MHz |
| Filament Voltage | 7.5 V |
| Filament Current | 8.0 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 broadcast transmitters
- VHF linear amplifiers
- European broadcast systems
- Scientific RF power
Key features
- 1.5 kW plate dissipation
- 300 MHz capable
- Thomson/Thales quality
- European broadcast standard
Related parts & equivalents
Recommended alongside or as alternatives to the TH308.
Similar RF Power Grid Tubes
Comparable type, ratings, manufacturer or applications.
Vacuum capacitors for tank & matching circuits
Often ordered with the TH308 for the same system.
Jennings UCSL 25–200 pF Variable Vacuum Capacitor 25 kV
Jennings Technology (CPI)
Capacitance Range 25–200 pF
Frequently asked questions
What is the TH308?
The TH308 is a power triode manufactured by Thomson / Thales. European ceramic-metal triode from Thomson/Thales with 1.5 kW plate dissipation for HF and VHF broadcast applications.
What are the specifications of the TH308?
Tube Type: Triode; Plate Dissipation: 1500 W; Max Plate Voltage: 5.0 kV; Max Plate Current: 0.8 A; Max Frequency: 300 MHz; Filament Voltage: 7.5 V; Filament Current: 8.0 A; Cooling: Forced air.
What is the TH308 used for?
The TH308 is used in HF broadcast transmitters, VHF linear amplifiers, european broadcast systems and scientific RF power.
What are alternatives or related parts to the TH308?
Related and comparable parts include TH781, 3CX3000F7, GU-43B, RS 1034L, RS 1034SK and RS 1094L. Contact PartnerTubes to confirm interchangeability for your equipment.
Where can I buy the TH308?
The TH308 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=TH308 or email info@partnertubes.com.