Power Triode Tubes For Sale: Industrial Triode Power Grid Tubes

For demanding RF and industrial applications, our triodes deliver stable output, long service life, and predictable performance. Whether you’re replacing legacy power triode tubes or specifying a new triode vacuum tube for a high-duty amplifier, Penta Labs supplies rigorously tested parts with full documentation and expert support. From broadcast and dielectric heating to laboratory and medical systems, each unit is built for clean signal integrity and dependable uptime.

Various power triode tubes for sale

This collection covers core types you’d deploy in a triode tube amplifier or RF generator, from compact bottles to high-dissipation workhorses. Each vacuum triode is engineered for linearity, gain, and thermal stability, and integrates seamlessly into industrial RF welders, broadcast transmitters, radar drivers, and medical front-ends—including the MRI RF amplifier chain.

As leading industrial triode suppliers, we stock tubes for MRI, radar, and RF heating systems where clean signal integrity is critical. Our triodes minimize distortion for precise frequency control—whether lifting microvolt-level signals in comms gear or sustaining megawatt-class RF loads. Choose from proven series such as 3CX2500H3 up to heavy-duty 3CX15,000A7 models.

Water cooled triode tubes

Water-cooled triodes are the choice for high plate-dissipation scenarios and continuous-duty service. A closed-loop coolant path pulls heat directly from the anode, enabling higher average power and tighter thermal margins. With proper flow rate, deionized water quality, and corrosion control, these tubes deliver outstanding stability for HF/VHF RF welders, plasma systems, and large transmitters. Robust seals, precision anode blocks, and carefully managed thermal paths help protect grid geometry and preserve linearity under sustained load.

Air cooled triode tubes

Air-cooled designs simplify integration where moderate to high intermittent power is required without the complexity of liquid systems. Finned anodes, forced-air plenums, and well-designed ducting maintain junction temperatures while keeping maintenance straightforward—ideal for mid-power RF generators, broadcast drivers, R&D benches, and retrofit upgrades. Correct airflow, filtration, and temperature interlocks ensure long service life and consistent gain with minimal downtime.

Vapor cooled triode tubes

Vapor-cooled triodes exploit phase-change cooling: heat at the anode vaporizes the working fluid, and the resulting vapor condenses in a heat-exchanger to return as liquid, transporting large thermal loads at near-constant temperature. This makes them excellent for high-average-power applications with limited coolant flow.

Properly specified condensers, pressure relief, and flow monitoring yield a compact, efficient thermal system with excellent transient handling—a smart middle ground between water and air solutions when footprint matters.

Why choose Penta Labs power triode tubes?

Penta Labs builds and supplies precision power grid tubes with the documentation, QA traceability, and hands-on engineering support serious operators require. Every vacuum tube triode for sale at Penta Labs is inspected, tested, and supported by application specialists who understand real-world loads, duty cycles, and integration constraints.

Backed by comprehensive warranties and expert technical support—including retrofitting guidance—Penta provides expendables and parts to end users and global leaders, including: Cosmos-Kabar, Thermex-Thermatron, Forsstrom, Fiab, and Miller Weldmaster/Zemat.

Not sure if we have the triode power grid tubes you need? Contact us using the details below, and we’ll verify fit, expected performance, and lead time.