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RF Measurement
RF Equipment
About
Built for sustained RF load and performance
Oil-Cooled
Oil-Cooled
2.5 kW RF Loads
The 8890-300 Series is a rugged, oil-cooled RF load engineered for continuous-duty performance up to 2500 W. Its self-contained design features a precision-tapered resistor immersed in dielectric coolant, providing a low-reflection termination across a wide frequency range.
With integrated Quick-Change (QC) connector compatibility, it’s ideal for transmitter tuning, test stations, and system protection where long-term thermal stability and reliability are essential.
Explore the 2.5 kW Series
2.5 kW Oil-Cooled Loads
8890 Series
Operates from DC to 2.4 GHz and reliably dissipates up to 2.5 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.
Ultra-Stable VSWR Oil-Cooled Load
8890-300SC13
2.5 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.
Compare Models
Find the right RF load for your application—side-by-side technical specs across Bird’s trusted solutions.
Model Number
Frequency Range and VSWR
Connector
Dimensions
Weight
Get Quote/Buy Now
8890-300
request_button
DC to 1 GHz @ 1.1 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max
QC Type, LC (f)
25.2 in x 7.5 in x 17.25 in
(638 mm x 190 mm x 437 mm)
(638 mm x 190 mm x 437 mm)
59 lbs (27 kg)
8890-300SC13
request_button
DC to 28 MHz @ 1.1 max
VSWR less than 1.05:1
VSWR less than 1.05:1
QC Type, LC (f)
25.2 in x 7 in x 17.2 in
(638 x 178 x 437 mm
(638 x 178 x 437 mm
59 lbs (27 kg)
8891-300
request_button
DC to 1 GHz @ 1.1 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max
3-1/8 EIA Flanged
25.2 in x 7.5 in x 17.25 in
(638 mm x 190 mm x 437 mm)
(638 mm x 190 mm x 437 mm)
59 lbs (27 kg)
8891D300
request_button
470 MHz to 860 MHz @ 1.065
3-1/8 EIA Flanged
25.2 in x 7.5 in x 17.25 in
(638 mm x 190 mm x 437 mm)
(638 mm x 190 mm x 437 mm)
59 lbs (27 kg)
8892-300
request_button
DC to 1 GHz @ 1.1 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.5 GHz @ 1.3 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.5 GHz @ 1.3 max
1-5/8 EIA Flanged
25.2 in x 7.5 in x 17.25 in
(638 mm x 190 mm x 437 mm)
(638 mm x 190 mm x 437 mm)
59 lbs (27 kg)
8892D300
request_button
470 MHz to 860 MHz @ 1.065
1-5/8 EIA Flanged
25.2 in x 7.5 in x 17.25 in
(638 mm x 190 mm x 437 mm)
(638 mm x 190 mm x 437 mm)
59 lbs (27 kg)
8895-300
request_button
DC to 1 GHz @ 1.1 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max
1 GHz to 2 GHz @ 1.25 max
2 GHz to 2.4 GHz @ 1.3 max
1-5/8 EIA Unflanged
25.2 in x 7.5 in x 17.25 in
(638 mm x 190 mm x 437 mm)
(638 mm x 190 mm x 437 mm)
59 lbs (27 kg)
Swipe for more
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 dummy loads—they’re peace of mind for your entire system.
