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RF Measurement
RF Equipment
About
Oil-Cooled
5 kW Series RF Loads
Bird’s 8920 Series RF Loads are designed to dissipate up to 5 kW of continuous power from DC to 1 GHz. Available in standard and ultra-stable VSWR models, each unit features a sealed coolant chamber, integrated vent plug, and external radiator fins for reliable thermal performance with minimal maintenance.
Designed for both freestanding and fixed mounting, the 8920 Series is trusted for non-radiating system alignment, high-power RF generator calibration, transmitter testing, and load substitution in demanding RF environments.
Explore the 5 kW Series Loads
5 kW Oil-Cooled RF Loads
8920 Series
Operates from DC to 1 GHz and reliably dissipates up to 5 kW of continuous RF power—all without external power or added infrastructure.
Key Features
- Oil-dielectric cooling with external fins and vent plug
- Optional thermoswitch to automatically shut off a generator
- Delivers low VSWR for consistent broadband performance
- Designed for freestanding or fixed mounting
Ideal for: RF generator calibration, transmitter testing, system tuning, labs or service applications.
SC13 Ultra-Stable Series
8921SC13 Series
5 kW load optimized for calibration and process control at 13.56 MHz with exceptional VSWR stability.
Key Features
- VSWR <1.05 typical between DC to 28 MHz
- Less than 0.1 dB VSWR variation during operation
- Ultra-stable VSWR eliminates warm-up requirements and minimizes calibration error
Ideal for: precision RF calibration at 13.56 MHz, test setups demanding minimal VSWR drift, semiconductor fabs, metrology labs and precision RF calibration applications.
Accessories
Compatible accessories to support installation, operation, and maintenance.
1 Gal. PMX-200
Silicone Oil Coolant
5-1070-2
RF Load Coolant is a low viscosity polydimethylsiloxane polymer with average kinematic viscosity of 20 cs.
5 Gal. PMX-200
Silicone Oil Coolant
5-1070-3
RF Load Coolant is a low viscosity polydimethylsiloxane polymer with average kinematic viscosity of 20 cs.
Thermoswitch Temperature Controller
8890-008
The 8890-008 Thermoswitch senses rising temperatures and cuts power before damage can occur. Designed with a responsive bimetallic mechanism, it delivers fast, reliable on/off control for oil-cooled RF loads.
Why RF Experts Choose Bird
For over 80 years, RF professionals have trusted Bird loads to deliver unmatched stability, low VSWR, and rugged reliability—whether on the bench or in the field. These aren’t just terminations—they’re peace of mind for your entire system.
